Mason is listed as questionable and will be a game-time decision, but, as the St. Louis Post-Dispatch's Jim Thomas points out, history suggests that a player with a soft-tissue injury who hasn't practiced all week likely won't suit up Sunday.
"I'm just trying to prepare myself as best as possible for this upcoming game, and trying to make the most of this opportunity right now," Cunningham said of possibly starting.
Cunningham made two starts in 2014, but compiled just six combined carries in those games (three yards on two totes in a Week 7 start versus the Seahawks). Entering his third NFL season, Cunningham has a total of 113 carries for 507 yards. Appearing in all 16 contests last season, the 25-year-old back never had more than nine carries in a contest and averaged just 3.7 yards per rush.