Baltimore Ravens running back Ricky Williams surprised the football world by announcing his retirement on Tuesday. At age 34, Williams has recently become the 26th player to reach 10,000 yards rushing, and he appeared to be enjoying his role as a backup to Ray Rice.
But 34 is old for football, and when it comes to running backs, it's practically ancient. Williams has played on and off for 13 years having retired once before. This time, though, it's a virtual certainty that he is done for good.
Williams' loss is big for the Ravens considering he was the guy that could come in and spell Rice for a couple plays. Although running backs Anthony Allen and Damian Berry remain on the Ravens roster, in all likelihood they will need to select a veteran via free agency.
This article is assuming Rice returns to Baltimore and doesn't leave in free agency. That being said, here are five running backs who would be a capable backup to Rice.