Colts winners in Saturday's debut, Ryan's return Indianapolis Colts 16h Stephen Holder Fantasy football Week 10: Justin Fields, Justin Jefferson take over 18h Matt Bowen and Tristan H. Cockcroft Panthers to start Baker Mayfield at QB with PJ Walker hurt play Mayfield replaces Walker, throws TD pass to Tremble (0:23) Baker Mayfield comes into the game and throws an 8-yard touchdown pass to Tommy Tremble. (0:23) 11:00 AM ET Associated Press CHARLOTTE, N.C. -- Baker Mayfield will start at quarterback for the Carolina Panthers on Sunday against the Baltimore Ravens after PJ Walker was diagnosed with a high ankle sprain. Walker was injured in Thursday night's 25-15 victory against the Atlanta Falcons , but coach Steve Wilks said Walker toughed it out and continued to play. The Panthers made no mention of the injury after the game. Walker will not play Sunday, and Sam Darnold will be Mayfield's backup. Wilks said there are no plans to put Walker on injured reserve. Editor's Picks Mayfield started the Panthers' first five games, going 1-4 with four touchdowns and four interceptions and a 71.9 quarterback rating. He relieved Walker two weeks ago at Cincinnati with the Panthers trailing 35-0 at halftime and threw for 155 yards and two touchdowns.