Stoops said he still planned on naming a starter later in the week, perhaps as early as Wednesday.
Bell has the game experience, spelling Landry Jones the last two seasons with the Belldozer. But the junior hasn't run the full offense with the game on the line.
Knight is just a redshirt freshman and has not played in anything bigger than the spring game.
The two are different with their feet as much as anything else — Bell is more of a power, inside runner while Knight is a speedier outside option — but either will make the position more mobile than it has been in recent years.
The likelihood that the starter is likely to take more of a pounding in the running game makes it critical to keep the second guy fresh.
“We're very aware that these guys are all capable of moving around with the ball more than maybe some we've had,” Stoops said. “If that happens, they're likely to take a few shots and/or they're fatigued. When you're not an older guy that's done it a bunch that takes awhile to get used to. Sometimes there may be a place to have two guys set to play.”