49ers' Jordan Mason Suffers Minor Shoulder Injury, Status Day-to-Day

San Francisco's leading rusher Jordan Mason is undergoing further tests after a shoulder injury, but initial reports indicate it's not serious.

Jordan Mason, the NFL's leading rusher, sustained a sprained AC joint in his left shoulder during the 49ers' win over the Seahawks.
Head coach Kyle Shanahan confirmed Mason's injury is not serious, though his availability for the next game against the Chiefs is uncertain.
Mason has filled in effectively for the injured Christian McCaffrey, amassing 609 rushing yards and three touchdowns this season.
Backup running back Isaac Guerendo impressed with 99 rushing yards, including a crucial 76-yard run, in Mason's absence.
The 49ers are also dealing with injuries to their kickers, with Matthew Wright suffering a shoulder injury during the same game.