BALTIMORE -- Ravens running back Justin Forsett broke his right arm in the first quarter of Baltimore's 16-13 victory against the Rams.
Forsett, the NFL's 10th-leading rusher, was slammed to the ground by Rams defensive tackle Aaron Donald with 4:50 left in the first quarter. He was helped off the field with his right arm in an air cast.
The Ravens now are down to their third running back, rookie fourth-round pick Buck Allen, after losing Forsett and backup running back Lorenzo Taliaferro, who was placed on IR on Oct. 14.
Forsett had a productive start Sunday, gaining 31 yards on his first three carries.