The Chiefs took a flier on McCoy following his surprise release by the Buffalo Bills on Aug. 31. He reunited with head coach Andy Reid, who originally drafted him in 2009 with the Philadelphia Eagles.
Through two games, McCoy has 21 carries for 104 yards and no touchdowns.
McCoy is coming off the worst season of his career. The six-time Pro Bowler averaged career lows in yards per carry (3.2), rushing yards per game (36.7) and total rushing yards (514).
Kansas City made perfect sense as a landing spot for McCoy because of his ability as a runner and receiver. Reid has a knack for being able to scheme his players into putting up at least solid numbers, especially with Patrick Mahomes running the offense.
Damien Williams will remain the primary running back if McCoy is forced out of action. Rookie Darwin Thompson can be elevated into the No. 2 role.