The Ravens placed running back Kenneth Dixon on injured reserve last week, but his season is not necessarily over. Dixon is a candidate to return from IR this season, according to head coach John Harbaugh (Twitter link via Jeff Zrebiec of The Athletic). 
Per league rules, each team is permitted to bring two players back from IR each season, provided that they are sidelined for at least eight weeks. Therefore, Dixon could return as soon as Week 11, after the Ravens’ bye in Week 10.
For now, the Ravens will move ahead with Buck Allen as the team’s top backup to starter Alex Collins. They’ve also promoted running back De’Lance Turner from the practice squad in order to provide depth at the position.
After being selected in the fourth round of the 2016 draft, Dixon averaged 4.3 yards per carry as a rookie. Last year, however, he was set back by a torn meniscus and multiple suspensions.