Rainey was released by the Ravens on Friday, Jeff Zrebiec of The Baltimore Sun reports.
Rainey signed with the Ravens in late July for some added depth in the backfield after the team lost Kenneth Dixon to meniscus surgery. He was essentially competing for the No. 3 spot on the running back depth chart behind Terrance West and Danny Woodhead, but it's likely that spot will go to Javorius Allen. Rainey likely still has value for some NFL teams, as he boasts a fairly reliable track record of both health and production.