Indianapolis Colts running back Marlon Mack was the 15th running back chosen in the 2017 NFL draft, which is not special, and one could certainly argue he did not get much opportunity to succeed his first season. The Colts were terrible sans quarterback Andrew Luck, a 4-12 team that gave most of the rushing attempts to ancient Frank Gore and rarely threw the football downfield. Mack looked like an intriguing player when he got the chance, but playing time and a shoulder injury made him irrelevant to fantasy managers that expected more.