Vikings quarterback Sam Bradford's return to Philadelphia left him bruised and battered.

After playing virtually mistake-free football through an unbeaten start, Bradford and the Vikings offense coughed up four turnovers and had trouble all over the field.

"The way we played today was unacceptable," Bradford said. "We did a lot of things today that we haven't done in the first five weeks.

"Things we did today will keep you from winning football games, and we've got to figure out away to fix those mistakes," he added. 

Bradford completed 24 of 41 passes for 224 yards with one touchdown and an interception. The quarterback, who had compiled a passer rating of 109.7 through his first four starts, had a passer rating of 71.6 against a tough Eagles defense.

The former No. 1 overall pick was sacked six times, and press box statisticians tallied 12 hits. He fumbled four times and lost two of them.

Vikings Head Coach Mike Zimmer said it was tough to evaluate Bradford's performance after the quarterback was under siege for most of the afternoon.

"It's hard to throw when someone is grabbing your arm," Zimmer said. "I'm not concerned about Bradford."

"I'm concerned about the offensive play in general," Zimmer said. 

Bradford said a performance that netted the Vikings offense 282 yards fell on everyone's shoulders.

"Obviously we knew they were good up front," Bradford said. "We've got to figure out a way, but it involves all of us.

"I've got to figure out a way to get it out quicker, and we've got to do a better job of staying on guys," he added. "I think there's a lot of answers to that problem."

Bradford's teammates took the blame for a sluggish performance on offense in which he was harassed for four quarters.

"He's a tough as they come," Vikings tight end Kyle Rudolph said of Bradford. "He's shown it five games in a row that he's willing to stand in there and take hits and throw the ball downfield.

"I'd like to eliminate some of those hits," he added. "It'd be great to keep him on his feet."

Added Vikings wide receiver Adam Thielen: "As receivers we could have done better, too. We could have got open more, we could have helped Sam get it out quicker by getting open."

Bradford was acquired from the Eagles in a Sept. 3 trade. He was Philadelphia's starting quarterback last season, going 7-7. Bradford visited old teammates on the field prior to Sunday's game.

"It was good to see all those guys," Bradford said. "I've got a lot of really good friends over there.

"Seeing some of those guys for the first time since the trade, it was good to see them," he added.

But the Vikings quarterback wasn't in the mood to exchange pleasantries after a game in which Minnesota looked out of sorts all afternoon.

"There were some things we'd like to have back," Bradford said. "We'll look at the tape."