View images of Vikings new S Derron Smith from his days with the Browns and the Bengals.
Cincinnati Bengals free safety Derron Smith (31) runs out to the field before an NFL Football game between Cincinnati Bengals and Washington Redskins at Wembley Stadium in London, Sunday Oct. 30, 2016. (AP Photo/Tim Ireland)
Cincinnati Bengals free safety Derron Smith runs the field during a warm up before an NFL preseason football game against the Cleveland Browns, Saturday, Aug. 29, 2015, in Cincinnati. (AP Photo/Gary Landers)
Cleveland Browns head coach Hue Jackson talks to Derron Smith (36) during the first half of a preseason NFL football game against the New York Giants Thursday, Aug. 9, 2018, in East Rutherford, N.J. (AP Photo/Adam Hunger)
Cleveland Browns defensive back Derron Smith waits on the play during the first half of an NFL football preseason game against the Detroit Lions, Thursday, Aug. 30, 2018, in Detroit. (AP Photo/Paul Sancya)
Cleveland Browns tight end David Njoku (85) catches a pass against defensive back Derron Smith (36) during NFL football training camp Sunday, Aug. 12, 2018, in Berea, Ohio. (AP Photo/Ron Schwane)
Cincinnati Bengals free safety Derron Smith walks off the field after an NFL football game against the Indianapolis Colts, Sunday, Oct. 29, 2017, in Cincinnati. The Bengals won 24-23. (AP Photo/Gary Landers)
Cleveland Browns defensive back Derron Smith (36) sprints downfield on special teams coverage during the game against the Green Bay Packers, Sunday, Dec. 10, 2017, Cleveland. The Packers defeated the Browns 27-21. (Al Tielemans via AP)
Cleveland Browns defensive back Derron Smith (36) drops into coverage during a game against the Buffalo Bills, Friday Aug. 17, 2018, Cleveland. The Bills defeated the Browns 19-17. (Al Tielemans via AP)
Detroit Lions wide receiver Dontez Ford (83) is tackled by Cleveland Browns cornerback Michael Jordan (41) and defensive back Derron Smith, right, during the first half of an NFL football preseason game, Thursday, Aug. 30, 2018, in Detroit. (AP Photo/Duane Burleson)
Dallas Cowboys tight end Jason Witten (82) breaks away from a tackle attempt by Cincinnati Bengals free safety Derron Smith after Witten caught a pass in the first half of an NFL football game, Sunday, Oct. 9, 2016, in Arlington, Texas. (AP Photo/Ron Jenkins)
Cleveland Browns wide receiver Rashard Higgins, left, outruns Cleveland Browns defensive back Derron Smith during NFL football training camp, Thursday, July 26, 2018, in Berea, Ohio. (AP Photo/Tony Dejak)
Cleveland Browns defensive back Derron Smith makes a catch during NFL football training camp Tuesday, Aug. 14, 2018, in Berea, Ohio. (AP Photo/Ron Schwane)
Cleveland Browns tight end David Njoku (85) makes a catch over defensive back Derron Smith (36) during NFL football training camp Sunday, Aug. 12, 2018, in Berea, Ohio. (AP Photo/Ron Schwane)
Cleveland Browns tight end David Njoku (85) catches a pass against defensive back Derron Smith (36) during NFL football training camp Sunday, Aug. 12, 2018, in Berea, Ohio. (AP Photo/Ron Schwane)
Baltimore Ravens wide receiver Breshad Perriman (18) is tackled at the 1-yard line by Cincinnati Bengals free safety Derron Smith in the second half of an NFL football game, Sunday, Jan. 1, 2017, in Cincinnati. (AP Photo/Gary Landers)
Indianapolis Colts wide receiver Quan Bray, center, is stopped by Cincinnati Bengals cornerback Bene Benwikere, left, and safety Derron Smith during the first half of an NFL preseason football game in Indianapolis, Thursday, Aug. 31, 2017. (AP Photo/AJ Mast)
Cleveland Browns defensive back Derron Smith (36) in action during an NFL preseason football game against the New York Giants, Thursday, Aug. 9, 2018, in East Rutherford, N.J. The Browns defeated the Giants, 20-10. (Ryan Kang via AP)
Cleveland Browns safety Derron Smith (36) watches from the sideline during a Week 13 NFL game against the Los Angeles Chargers on Sunday, December 3, 2017, in Carson, Calif. The Chargers defeated the Browns 19-10. (Kevin Terrell via AP)
Cincinnati Bengals free safety Derron Smith (31) celebrates his interception for a 60-yard touchdown against the Detroit Lions in the first half of an NFL preseason football game in Detroit, Thursday, Aug. 18, 2016. (AP Photo/Rick Osentoski)
Cincinnati Bengals free safety Derron Smith (31) takes a defensive position during an NFL game against the Indianapolis Colts, Sunday, Oct. 29, 2017 in Cincinnati. (Margaret Bowles via AP)
New England Patriots tight end Rob Gronkowski (87) catches a pass between Cincinnati Bengals Cincinnati defenders Vincent Rey (57) Derron Smith (31) and Vontaze Burfict (55) during the second half of an NFL football game, Sunday, Oct. 16, 2016, in Foxborough, Mass. (AP Photo/Elise Amendola)
Cincinnati Bengals' Derron Smith (40) in action during the first half of an NFL preseason football game against the Indianapolis Colts, Thursday, Sept. 3, 2015, in Indianapolis. (AP Photo/Michael Conroy)
Cincinnati Bengals' Derron Smith (40) in action during the first half of an NFL preseason football game against the Indianapolis Colts, Thursday, Sept. 3, 2015, in Indianapolis. (AP Photo/Michael Conroy)
Cincinnati Bengals free safety Derron Smith (31) takes a defensive position during an NFL game against the Indianapolis Colts, Sunday, Oct. 29, 2017 in Cincinnati. (Margaret Bowles via AP)
Denver Broncos wide receiver Emmanuel Sanders (10) runs the ball against Cincinnati Bengals cornerback Adam Jones (24) and free safety Derron Smith (31) during the first half of an NFL football game, Sunday, Sept. 25, 2016, in Cincinnati. (AP Photo/Frank Victores)
FILE - in this Oct. 16, 2016, file photo, New England Patriots tight end Rob Gronkowski (87) catches a pass between Cincinnati Bengals safety Derron Smith (31) and linebacker Vontaze Burfict (55) during anNFL football game in Foxborough, Mass. The Patriots play the Seattle Seahawks this week. (AP Photo/Elise Amendola, File)
Tampa Bay Buccaneers running back Mike James (25) rushes for yardage in front of Cincinnati Bengals defensive tackle DeShawn Williams (69), free safety Derron Smith (40) and defensive end Will Clarke (93) during the second half of a preseason NFL football game in Tampa, Fla., Monday, Aug. 24, 2015. (AP Photo/Phelan M. Ebenhack)
Cincinnati Bengals free safety Derron Smith (40) sits on the sidelines during the second half of an NFL football game against the Arizona Cardinals , Sunday, Nov. 22, 2015, in Glendale, Ariz. (AP Photo/Ross D. Franklin)
Tampa Bay Buccaneers tight end Cameron Brate, RIGHT, is stopped by Cincinnati Bengals free safety Derron Smith, left, during the third quarter of an NFL preseason football game Monday, Aug. 24, 2015, in Tampa, Fla. (AP Photo/Phelan M. Ebenhack)
Cincinnati Bengals' Derron Smith (40) in action during the first half of an NFL preseason football game against the Indianapolis Colts, Thursday, Sept. 3, 2015, in Indianapolis. (AP Photo/Michael Conroy)
Cincinnati Bengals free safety Derron Smith (31) returns an interception for a 60-yard touchdown against the Detroit Lions in the first half of an NFL preseason football game in Detroit, Thursday, Aug. 18, 2016. (AP Photo/Rick Osentoski)
Cincinnati Bengals' Derron Smith (40) in action during the second half of an NFL preseason football game against the Indianapolis Colts, Thursday, Sept. 3, 2015, in Indianapolis. (AP Photo/Michael Conroy)
EAGAN, Minn. — The Vikings have added a pair of defensive backs to their roster in safety Derron Smith and cornerback Duke Thomas.
Both players recently played for the San Antonio Commanders in the Alliance of American Football.
Minnesota announced the roster additions on Friday.
Smith had 21 total tackles and three interceptions in seven games with San Antonio.
The 27-year-old was a sixth-round pick by Cincinnati in 2016 out of Fresno State. He played 31 games in two-plus seasons with the Bengals before appearing in seven games with Cleveland in 2017 after the Browns snagged him from Cincinnati's practice squad.
Smith was a three-time First-Team All-Mountain West selection for the Bulldogs in college.
View images of Vikings new CB Duke Thomas from his days in the AAF, with the Dallas Cowboys and the Houston Texans.
Arizona Hotshots running back Jhurell Pressley (26) runs away from San Antonio Commanders defensive back Duke Thomas (21) in the second half during an AAF football game, Sunday, March 10, 2019, at Sun Devil Stadium in Phoenix. San Antonio defeated Arizona 29-25. (AP Photo/Rick Scuteri)
San Antonio Commanders defensive back Duke Thomas (21) during an AAF football game against the Arizona Hotshots, Sunday, March 10, 2019, at Sun Devil Stadium in Phoenix. (AP Photo/Rick Scuteri)
San Antonio Commanders defensive back Duke Thomas (21) reaches to deflect a pass for Arizona Hot Shots wide receiver Rashad Ross (15) in the second half during an Arizona Hotshots at San Antonio Commanders AAF football game, Sunday, March 31, 2019, at the Alamodome in San Antonio. (AP Photo/Chris Covatta)
Los Angeles Rams quarterback Sean Mannion (14) recovers a fumbled snap ahead of Dallas Cowboys cornerback Duke Thomas (26) and defensive end Charles Tapper during an NFL preseason football game, Saturday, Aug. 12, 2017 in Los Angeles. The Rams defeated the Cowboys, 13-10. (James D. Smith via AP)
Dallas Cowboys cornerback Duke Thomas (26) intercepts a pass during an NFL football practice Wednesday, May 24, 2017 in Frisco, Texas. (James D. Smith via AP)
Dallas Cowboys defensive back Duke Thomas (26) and Cincinnati Bengals linebacker Malik Jefferson (45) pose for a photo following a preseason NFL football game between the Cincinnati Bengals and the Dallas Cowboys in Arlington, Texas, Saturday, Aug. 18, 2018. (AP Photo/Michael Ainsworth)
Dallas Cowboys cornerback Duke Thomas (26) during an NFL preseason football game against the Indianapolis Colts, Saturday, Aug. 19, 2017 in Arlington, Texas. The Cowboys defeated the Colts, 24-19. (James D. Smith via AP)
Dallas Cowboys secondary coach Kris Richard (right) congratulates cornerback Duke Thomas (26) for a play during an NFL training camp practice Saturday, July 28, 2018 at City of Oxnard Fields in Oxnard, California. (James D. Smith via AP)
Dallas Cowboys cornerback Chidobe Awuzie (24) blocks for cornerback Duke Thomas (left) returning a kickoff during an NFL training camp practice Monday, August 6, 2018 at City of Oxnard Fields in Oxnard, California. (James D. Smith via AP)
Dallas Cowboys cornerback Duke Thomas (26) during an NFL training camp practice Wednesday, August 8, 2018 at City of Oxnard Fields in Oxnard, California. (James D. Smith via AP)
Dallas Cowboys cornerback Duke Thomas (26) tackles Houston Texans receiver Vyncint Smith (17) after a catch during a 2018 NFL week 4 preseason game, Thursday, August 30, 2018 in Houston, Texas. The Texans defeated the Cowboys, 14-6. (James D. Smith via AP)
Dallas Cowboys cornerback Duke Thomas (26) covers safety Tyree Robinson (23) in a drill during organized team activity at the NFL football team's training facility in Frisco, Texas, Wednesday, May 30, 2018. (James D. Smith via AP)
NFL official Brad Freeman (center) talks with Dallas Cowboys cornerbacks Donovan Olumba (32) and Duke Thomas (26) in a time out during a 2018 NFL week 4 preseason game against the Houston Texans, Thursday, August 30, 2018 in Houston, Texas. The Texans defeated the Cowboys, 14-6. (James D. Smith via AP)
Dallas Cowboys cornerback Duke Thomas (26) returns a kickoff during a 2018 NFL week 2 preseason game against the Cincinnati Bengals, Saturday, August 18, 2018 in Arlington, Texas. The Bengals defeated the Cowboys, 21-13. (James D. Smith via AP)
Dallas Cowboys receiver Michael Gallup (13) reaches for a pass as cornerback Duke Thomas (26) defends during an NFL training camp practice Thursday, July 26, 2018 at City of Oxnard Fields in Oxnard, California. (James D. Smith via AP)
Dallas Cowboys cornerback Duke Thomas (26) walks along the sideline during warm ups before a preseason NFL football game against the Oakland Raiders on Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Ron Jenkins)
Dallas Cowboys defensive back Duke Thomas (26) returns a kick during an NFL football game against the Oakland Raiders on Saturday, Aug. 26, 2017 in Arlington, Texas. The Cowboys won the game, 24-20. (Greg Trott via AP)
Dallas Cowboys cornerback Duke Thomas (26) walks along the sideline during warm ups before a preseason NFL football game against the Oakland Raiders on Saturday, Aug. 26, 2017, in Arlington, Texas. (AP Photo/Ron Jenkins)
Dallas Cowboys cornerback Duke Thomas (26) returns a kickoff during a 2018 NFL week 2 preseason game against the Cincinnati Bengals, Saturday, August 18, 2018 in Arlington, Texas. The Bengals defeated the Cowboys, 21-13. (James D. Smith via AP)
Dallas Cowboys cornerback Duke Thomas (26) during a 2018 NFL week 2 preseason game against the Cincinnati Bengals, Saturday, August 18, 2018 in Arlington, Texas. The Bengals defeated the Cowboys, 21-13. (James D. Smith via AP)
Cincinnati Bengals defensive end Sam Hubbard (94) reaches for Dallas Cowboys kick returner Duke Thomas (26) during a 2018 NFL week 2 preseason game, Saturday, August 18, 2018 in Arlington, Texas. The Bengals defeated the Cowboys, 21-13. (James D. Smith via AP)
Dallas Cowboys cornerback Duke Thomas (26) intercepts a pass in a drill during organized team activity at the NFL football team's training facility in Frisco, Texas, Monday, June 4, 2018. (James D. Smith via AP)
Dallas Cowboys wide receiver Brice Butler (19) is grabbed by defensive back Duke Thomas (26) after a reception during an NFL football camp practice in Frisco, Texas, Tuesday, Aug. 22, 2017. (AP Photo/LM Otero)
Dallas Cowboys secondary coach Kris Richard (center) talks with receiver Cedrick Wilson (16) and cornerback Duke Thomas (26) during an NFL training camp practice Friday, July 27, 2018 at City of Oxnard Fields in Oxnard, California. (James D. Smith via AP)
Dallas Cowboys cornerback Duke Thomas (26) makes an interception during an NFL training camp practice Saturday, August 4, 2018 at City of Oxnard Fields in Oxnard, California. (James D. Smith via AP)
Indianapolis Colts running back Marlon Mack (25) is stopped on a run by Dallas Cowboys cornerback Duke Thomas (26) and cornerback Sammy Seamster (29) in the second half of a preseason NFL football game, Saturday, Aug. 19, 2017, in Arlington, Texas. (AP Photo/Ron Jenkins)
Dallas Cowboys defensive back Duke Thomas (26) carries the ball during warm ups prior to an NFL preseason football game against the Los Angeles Rams on Saturday, Aug. 12, 2017 in Los Angeles. The Rams won 13-10. (Peter Read Miller via AP)
Dallas Cowboys cornerbacks Duke Thomas (26) and Jourdan Lewis (27) in a drill during organized team activity at the NFL football team's training facility in Frisco, Texas, Tuesday, May 29, 2018. (James D. Smith via AP)
Indianapolis Colts wide receiver Bug Howard (83) leaps to make a catch over Dallas Cowboys cornerback Leon McFadden (23) an cornerback Duke Thomas (26) in the second half of a preseason NFL football game, Saturday, Aug. 19, 2017, in Arlington, Texas. (AP Photo/Ron Jenkins)
Dallas Cowboys secondary coach Kris Richard (right) talks to cornerback Duke Thomas (26) during organized team activity at the NFL football team's training facility in Frisco, Texas, Thursday, May 31, 2018. (James D. Smith via AP)
Dallas Cowboys cornerback Duke Thomas (26) lines up in a drill during organized team activity at the NFL football team's training facility in Frisco, Texas, Wednesday, May 23, 2018. (James D. Smith via AP)
Indianapolis Colts running back Marlon Mack (25) fights for extra yardage on a running play as Dallas Cowboys cornerback Duke Thomas (26) and cornerback Sammy Seamster (29) attempt the stop during a preseason NFL football game, Saturday, Aug. 19, 2017, in Arlington, Texas. (AP Photo/Ron Jenkins)
Dallas Cowboys cornerback Duke Thomas (26) returns a kickoff during an NFL preseason football game against the Oakland Raiders, Saturday, Aug. 26, 2017 in Arlington, Texas. The Cowboys defeated the Raiders, 24-20. (James D. Smith via AP)
Dallas Cowboys defensive back Duke Thomas #26 during an NFL preseason football game against the Los Angeles Rams on Saturday, Aug. 12, 2017 in Los Angeles. (Ric Tapia via AP)
Dallas Cowboys wide receiver Brice Butler, left, gets by defensive back Duke Thomas (26) and runs the ball after a reception during NFL football training camp in Oxnard, Calif., Wednesday, July 26, 2017. (AP Photo/Gus Ruelas)
Dallas Cowboys defensive back Duke Thomas (26) in coverage during an NFL preseason football game against the Los Angeles Rams on Saturday, Aug. 12, 2017 in Los Angeles. The Rams won 13-10. (Peter Read Miller via AP)
Indianapolis Colts wide receiver Bug Howard (83) leaps to make a catch over Dallas Cowboys cornerback Leon McFadden (23) an cornerback Duke Thomas (26) in the second half of a preseason NFL football game, Saturday, Aug. 19, 2017, in Arlington, Texas. (AP Photo/Ron Jenkins)
Dallas Cowboys receiver Andy Jones (81) turns after a catch as cornerback Duke Thomas (26) defends during an NFL training camp, Thursday, August 10, 2017 in Oxnard, California. (James D Smith via AP)
Dallas Cowboys cornerback Duke Thomas (26) during an NFL preseason football game against the Los Angeles Rams, Saturday, Aug. 12, 2017 in Los Angeles. The Rams defeated the Cowboys, 13-10. (James D. Smith via AP)
Dallas Cowboys cornerback Duke Thomas (26) during an NFL preseason football game against the Indianapolis Colts, Saturday, Aug. 19, 2017 in Arlington, Texas. The Cowboys defeated the Colts, 24-19. (James D. Smith via AP)
Dallas Cowboys cornerback Duke Thomas (26) intercepts a pass during an NFL football organized team activities practice at the team's training facility, Tuesday, May 30, 2017 in Frisco, Texas. (James D. Smith via AP)
Dallas Cowboys cornerback Duke Thomas (26) runs a drill during an NFL football practice Tuesday, May 23, 2017 in Frisco, Texas. (James D. Smith via AP)
Dallas Cowboys receiver Cole Beasley (11) runs after a catch as cornerback Duke Thomas (26) defends during an NFL training camp, Thursday, August 10, 2017 in Oxnard, California. (James D Smith via AP)
Houston Texans defensive back Duke Thomas watches during a practice at the NFL football team's training camp, Sunday, July 31, 2016, in Houston. (AP Photo/Eric Christian Smith)
Houston Texans defensive back Duke Thomas (40) lines up during a Week 2 preseason NFL football game against the New Orleans Saints on Saturday, Aug. 20, 2016 in Houston. The Texans beat the Saints 16-9. (Matt Patterson via AP)
Dallas Cowboys receiver Cole Beasley (11) is tackled after a catch by cornerback Duke Thomas (26) during an NFL training camp, Thursday, August 10, 2017 in Oxnard, California. (James D Smith via AP)
Dallas Cowboys safety Duke Thomas (26) of Texas during the NFL football team's rookie minicamp Friday, May 12, 2017 in Frisco, Texas. (James D. Smith via AP)
Dallas Cowboys cornerback Duke Thomas (26) of Texas during the NFL football team's rookie minicamp Friday, May 12, 2017 in Frisco, Texas. (James D. Smith via AP)
Dallas Cowboys cornerback Duke Thomas reaches up to catch a pass during an NFL football practice at the team's training facility, Wednesday, June 14, 2017, in Frisco, Texas. (AP Photo/Tony Gutierrez)
Dallas Cowboys defensive back Duke Thomas (26) waits for the snap during an NFL football game against the Los Angeles Rams on Saturday, Aug. 12, 2017 in Los Angeles. The Rams won the game, 13-10. (Greg Trott via AP)
Dallas Cowboys cornerback Duke Thomas (26) runs drills during an NFL training camp, Tuesday, July 25, 2017 in Oxnard, California. (James D Smith via AP)
Thomas had a team-high 22 tackles with an interception and a fumble recovery for the Commanders.
Thomas went undrafted out of Texas in 2016 and spent that offseason with the Houston Texans. He was then on Philadelphia and San Francisco's practice squad in 2016.
Thomas missed the 2017 season with an injury and spent time in the Canadian Football League on Toronto's practice squad in 2018. He then joined San Antonio in the AAF.
He was a two-time All-Big 12 Honorable Mention for his play with the Longhorns. Thomas played in 51 games with 35 starts and had seven collegiate interceptions.
