Lots of QB shuffling early in season, led by Big 12

FILE- In this Saturday, Sept. 11, 2021, file photo, Iowa State's Brock Purdy plays against Iowa during an NCAA football game in Ames, Iowa. Fourth-year Iowa State starter Brock Purdy found himself benched in the fourth quarter of the biggest home game in program history, though coach Matt Campbell has since reiterated his “great trust” in his veteran quarterback. (AP Photo/Justin Hayworth, File)

FILE- In this Saturday, Sept. 11, 2021, file photo, Kansas State quarterback Skylar Thompson (7) is helped off the field after getting injured in the first half of an NCAA college football game against Southern Illinois in Manhattan, Kan. Thompson was having a good start to his sixth year in Kansas State's program before a knee injury that will keep him out indefinitely. (AP Photo/Charlie Riedel, File)

FILE - In this April 24, 2021, file photo, Texas quarterbacks Casey Thompson, left, and Hudson Card warm up before the Texas Orange and White Spring NCAA college football game in Austin, Texas. First-year Texas coach Steve Sarkisian is already shuffling starters, replacing inconsistent redshirt freshman Hudson Card with junior Casey Thompson with the Longhorns already unranked. (AP Photo/Michael Thomas, File)