Stidham will be in a boot for two to three weeks and then is expected to play in the team's bowl game, coach Art Briles said on Russillo and Kanell on ESPN Radio.
Stidham suffered the injury in the first half of Baylor's 45-35 win over Oklahoma State on Saturday. Briles said Monday that Stidham was "highly questionable" for Friday's game against TCU with an injured fibula as well as back and hand injuries.
The No. 7-ranked Bears now turn to sophomore Chris Johnson to lead their run at a third consecutive Big 12 title. Johnson played receiver for most of the season but took over for Stidham against Oklahoma State and scored three touchdowns. He'll make his first career start Friday at No. 19 TCU.
Stidham, a true freshman, has thrown for 1,265 yards and 12 touchdowns this season. He started three games after Baylor lost its No. 1 quarterback, Seth Russell, to a season-ending neck injury on Oct. 24.