The Oakland Raiders signed running back Isaiah Crowell on Thursday.
Terms were not disclosed, but a source told ESPN's Adam Schefter that Crowell signed a one-year deal worth up to $2.5 million.
Doug Martin and Marshawn Lynch, who finished first and second for the Raiders in rushing yards last season, are both free agents. The Raiders currently have four running backs on their roster: Jalen Richard, DeAndre Washington, Chris Warren III and James Butler.
Crowell's addition likely ends any chance Martin will return to the Raiders.