Allen told reporters: "I think obviously we have to look at it. I think when you look at it I don't think Matt played well in this game. Obviously, I thought Terrelle came in and gave us a spark. I thought he played well in the game.
"I think that's something that we have to go and look at it. I'm not going to make any decisions on anything, obviously, tonight.
"I want to get a chance to go back and look at the tape and see how things went. But it was obvious that Terrelle gave us a little bit of a spark tonight."
Oakland face the Indianapolis Colts in their opening regular season game.