49ers RB Mostert lost for season with broken arm

San Francisco 49ers head coach Kyle Shanahan on Friday confirmed his team's worst fears, telling reporters that running back Raheem Mostert suffered a broken right forearm in Thursday night's game and will miss the rest of the 2018 season.

In another roster move, the 49ers re-signed quarterback Tom Savage to a one-year deal after waiving him on Thursday. Savage, a 6-foot-4, 230-pound veteran formerly with the Houston Texas, spent the offseason with the New Orleans Saints. The 49ers initially signed him on Oct. 16 as a third QB, then he was waived on Oct. 20.

Mostert suffered the injury in the third quarter of the 34-3 win over the Oakland Raiders. He underwent surgery Friday and was placed on injured reserve. And, according to the coach, the injury could be worse than just the broken bone.

"I wasn't told how long [the recovery] would be," Shanahan told reporters. "He's out for the year but I'm sure he'll be fine by next year. It's a broken bone, different ligaments, and things like that."

With 4:38 remaining in the third quarter Thursday night, Mostert suffered the injury on a rushing attempt for no gain when he was met with force by Raiders defensive tackle Clinton McDonald. 49ers medical personnel rushed on the field after the play, having spotted the gruesome injury from the sideline.

Mostert had a 52-yard touchdown run and finished the game with seven carries for 86 yards. He's averaging 7.7 yards per carry in 2018.

The 49ers lost their original starting running back, Jerrick McKinnon, to a torn ACL before the season began. Matt Breida, another breakout back, has been hobbled by a variety of injuries throughout the season. The only other running back currently on the roster is veteran Alfred Morris.

Also going on IR was cornerback Emmanuel Moseley, who has played in only one game this season.

--Field Level Media

(This story has not been edited by Devdiscourse staff and is auto-generated from a syndicated feed.)