Update: Martin has been ruled out for the game.
The Tampa Bay Buccaneers may just have been dealt a serious blow: running back Doug Martin left the game against the Arizona Cardinals with a hamstring injury, and his return was listed as doubtful.
Martin was the second-leading rusher in the league last year, and the Bucs re-signed him to a big contract this offseason, hoping to continue to build their running game around their 2012 first-round pick.
Martin had seven carries for just 23 yards so far against Arizona, with no catches yet, after punishing the Falcons both on the ground and through the air last week.
With Martin out, the Bucs will turn to Charles Sims as their main running back. Sims has been highly productive in limited time, especially as a receiver, but it remains to be seen whether he can be the focus of their running game.
The team also signed former Falcons running back Jacquizz Rodgers this week, and he should get some of the load — though like Sims, he’s more of a receiving back than an inside runner.