Lions running back Joique Bell is believed to have suffered a concussion at the end of the third quarter. He was evaluated for a head injury and team officials prohibited him from speaking to media after the game, a league-wide policy for concussed players.
"Not going to talk about injuries, in particular," Caldwell said. "I'll leave that up to our injury report. You can take a look at that when it does come out."
Theo Riddick has a hamstring issue, meaning Reggie Bush could be in line for a big workload in Week 5 against the Bills.