"The issue as a player is, in time, mentally can he do all the processing and make good throws. Some guys get a little overwhelmed. Sam (Bradford) is going through a little of that in the NFL phase right now (in St. Louis). Those are things we'll figure out in preseason."
Stoops sometimes has given the majority of snaps to his starting quarterback but said the backup, whether it's Bell or Allen, might play more this season.
"It always depends on the game, depends on situations, how (Bell) or Drew come along," Stoops said. "Making it a point to give him some series here and there is only going to develop him further and have him more prepared. I just don't know until we get out there."