Joe McKnight-RB- Player Mar. 31 - 6:44 pm et According to NFL Network's Lindsay Soto, USC RB Joe McKnight was limited at the Trojans' Pro Day by a re-aggravated toe injury. Soto mentioned that McKnight struggled in agility drills during the workout. McKnight also rested on his 4.47 forty from the Combine. He hasn't generated a lot of buzz of late, but McKnight projects as an NFL-ready third-down back.