Talking with media on Monday, Jim Harbaugh shared why redshirt freshman RB Kareem Walker and freshman WR Oliver Martin weren’t dressed against Cincinnati.
Kareem Walker knee issue. Oliver Martin upper extremity. Injuries are nobody's business says Harbaugh
— Adam Biggers (@AdamBiggers81) September 11, 2017
Walker is expected to see time at some point this fall. It’s possible Martin will see a redshirt this year with the depth at WR.