Jordan Mason sprained the AC joint shoulder Thursday during the 49ers' 36-24 win over the Seahawks. He returned to the game for one play, ran the bal

The NFL’s leading rusher in 2023 remains out indefinitely, with Christian McCaffery nursing Achilles tendinitis in both legs. As for the NFL’s leading rusher in 2024, Jordan Mason has a sprained AC joint in his left shoulder,

Mason injured his shoulder in the second quarter of the 49ers’ Week 6 win over the Seattle Seahawks. He returned for the second half, but exited after aggravating the shoulder on the first play of the third quarter. He spent the remainder of the game on the sideline and head coach Kyle Shanahan didn’t have much information after the game.