One of the NFL's most alluring plays since the 2011 Collective Bargaining Agreement went into effect has been trading up into the late picks of first rounds.

The prevalent reason is that teams have fifth-year options on first rounders under the CBA. The increased time for assessment or development can be a helpful tool in building rosters.

Teams must declare their intentions by a selected league-wide date (this year it is May 2 for the 2019 season on 2015 first-round picks, including cornerback Trae Waynes).

The Vikings have thrice traded back into the first round in the past seven drafts. Minnesota climbed the board to select Harrison Smith at the 29th overall spot in 2012 and did so again the following year by tabbing Cordarrelle Patterson.

In 2014, Minnesota secured the final pick of the first round to select Teddy Bridgewater 32nd overall.

The Vikings used their fifth-year option on Smith and eventually worked out a long-term deal.

Minnesota opted not to use the option on Patterson or Bridgewater, who missed his entire third season because of a knee injury. Bridgewater made it back to the field for an appearance in Minnesota's 34-7 Week 15 win over Cincinnati last season.

Prior to the injury, Spielman had talked about the value of having a fifth-year option on players, particularly quarterbacks.

That brings us to the final question of **this week’s Monday Morning Mailbag**, which inquired about the possibility of Minnesota trading down from the 30th overall spot and out of the first round.

The Vikings essentially will have three options on Thursday when the 2018 NFL Draft opens. Minnesota can stay put, nudge upward (which would come with a cost, most likely of a pick or picks) or move down (likely receiving one or more selections as an enticement).

It will be interesting to watch potential chain reactions on Thursday.

Until then, however, here's a look at trades involving overall picks 28-32 since 2011.

In six of seven seasons, the team with the 30th overall selection has stayed put.

The 31st overall selection has been involved in five swaps, followed by three times each for the 28th and 29th selections.

One of the times counted toward the 31st overall pick includes New Orleans acquiring the selection in a March 2015 trade involving Jimmy Graham and Max Unger.

The Saints picked up the 32nd overall pick last year by dealing Brandin Cooks to New England in March 2017.

Picks 28-32 since 2011 CBA went into effect

2011

28. Mark Ingram, RB, Saints | New Orleans traded up; sent 2011 second (Shane Vereen, 56, NE), 2012 first (Kevin Zeitler, 27, CIN) to New England for pick

29. Gabe Carimi, T, Bears

30. Muhammad Wilkerson, DT, Jets

31. Cam Heyward, DE, Steelers

32. Derek Sherrod, T, Packers

2012

28. Nick Perry, DE, Packers

29. Harrison Smith, S, Vikings | Minnesota traded up; sent 2012 second (Courtney Upshaw, 35, BAL), 2012 fourth (Gino Gradkowski, 98, BAL) to Baltimore for pick

30. A.J. Jenkins, WR, 49ers

31. Doug Martin, RB, Buccaneers | Tampa Bay traded up; sent 2012 second (Derek Wolfe, 36, DEN), 2012 fourth (Omar Bolden, 101, DEN) to Denver for pick and 2012 fourth (Jared Crick, 126, HOU)

Note: Denver initially acquired the pick from New England after trading down from 25th to 31st and picking up a 2012 fourth (Jared Crick, 126, HOU).

32. David Wilson, RB, Giants

2013

28. Sylvester Williams, DT, Broncos

29. Cordarrelle Patterson, WR, Vikings | Minnesota traded up; sent 2013 second (Jamie Collins, 52, NE), 2013 third (Logan Ryan, 83, NE), 2013 fourth (Josh Boyce, 102, NE) and 2013 seventh (Everett Dawkins, 229, MIN) for pick

Note: Minnesota reacquired the 229th overall pick from Tampa Bay after the Buccaneers claimed it in a deal with New England.

30. Alec Ogletree, LB, Rams | St. Louis traded down from 22nd to 30th spot; Rams acquired pick, 2013 third (Stedman Bailey, 92, STL) and 2013 sixth (Chris Jones, 198, HOU) for sending 2013 first (Desmond Trufant, 22, ATL) and 2015 seventh (Akeem King, 249, ATL) to Falcons

31. Travis Frederick, C, Cowboys | Dallas traded down from 18th to 31st; Cowboys acquired pick and 2013 third (Terrance Williams, WR, DAL) for sending 2013 first (Eric Reid, 18, SF) to 49ers

32. Matt Elam, S, Ravens

2014

28. Kelvin Benjamin, WR, Panthers

29. Dominique Easley, DT, Patriots

30. Jimmie Ward, DB, 49ers

31. Bradley Roby, CB, Broncos

32. Teddy Bridgewater, QB, Vikings | Minnesota traded up; sent 2014 second (Kyle Van Noy, 40, DET) and 2014 fourth (Cassius Marsh, 108, SEA) for pick 

2015

28. Laken Tomlinson, G, Lions | Detroit traded down from 23rd to 28th spot; Lions acquired Manny Ramirez, pick, 2015 fifth (MyCole Pruitt, 143, MIN) and 2016 fifth (Antwione Williams, 196, DET) for sending 2015 first (Shane Ray, 23, DEN) to Broncos

29. Phillip Dorsett, WR, Colts

30. Damarious Randall, CB, Packers

31. Stephone Anthony, ILB, Saints | New Orleans traded Jimmy Graham and 2015 fourth (Arie Kouandjio, 112, WAS) to Seattle for Max Unger and 2015 first (Anthony, 31, NO)

32. Malcom Brown, DT, Patriots

2016

28. Joshua Garnett, G, 49ers | San Francisco traded up; sent 2016 second (Chris Jones, 37, KC), 2016 fourth (Parker Ehringer, 105, KC) and 2016 sixth (D.J. White, 178, KC) to Chiefs for pick and 2016 seventh (Prince Charles Iworah, 249, SF)

29. Robert Nkemdiche, DT, Cardinals

30. Vernon Butler, DT, Panthers

31. Germain Ifedi, G, Seahawks | Seattle traded down from 26th to 31st spot; Seahawks acquired pick and 2016 third (Nick Vannett, 94, SEA) for 2016 first (Paxton Lynch, 26, DEN)

Note: The Patriots originally were scheduled to have the 29th pick, but their selection was forfeited, resulting in 31 selections in the first round.

*

*2017

28. Taco Charlton, DE, Cowboys

29. David Njoku, TE, Browns | Cleveland traded up; sent 2017 second (Kevin King, 33, GB) and 2017 fourth (Vince Biegel, 108, GB) to Packers for pick

30. T.J. Watt, OLB, Steelers

31. Reuben Foster, LB, 49ers | San Francisco traded up; sent 2017 second (Cam Robinson, 34, JAX) and 2017 fourth (Tedric Thompson, 111, SEA) to Seattle

Note: Seattle initially acquired the pick from Atlanta after trading down from 26th to 31st and picking up a 2017 third (Delano Hill, 95, SEA) and 2017 seventh (Chris Carson, 249, SEA).

32. Ryan Ramczyk, T, Saints | New Orleans traded Brandin Cooks and 2017 fourth (forfeited by NE) to New England for 2017 first (Ramczyk, 32, NO) and 2017 third (Trey Hendrickson, 103, NO)