Green won the No. 5 job at running back, Dave Birkett of the Detroit Free Press reports.
The Lions already knew Green could be an asset on special teams, but they were probably pleasantly surprised by his scintillating offensive performance in the preseason finale, where Green carried eight times for 63 yards and caught four passes for 87 yards and a score -- including a 74-yard catch and run in which Green broke multiple tackles before weaving his way into the painted area. However, as the No. 5 runner in Detroit, Green's at least a couple injuries away from gaining any fantasy relevance.