San Francisco 49ers running back Jordan Mason suffered an injury during Thursday night’s game against the Seattle Seahawks, but it does not sound like he is in danger of missing significant time.

Mason got off to a great start in San Francisco’s 36-24 win over the Seahawks at Lumen Field in Seattle, Wash. After rushing for 65 yards on 8 carries in the first half, Mason left the game with a shoulder injury. He returned at the start of the second half and ripped off an 8-yard run on the Niners’ first offensive play, but he exited for good again after that.

According to ESPN’s Adam Schefter, Mason suffered a sprained AC joint. The injury is not considered serious, but the third-year back will undergo more tests to determine the full extent.

Mason has been outstanding this season for the 49ers while filling in for Christian McCaffrey, who has not played because of his Achilles injuries. Mason leads the NFL with 609 rushing yards through six games. He has 3 rushing touchdowns and has added 75 receiving yards.

The good thing for Mason is that San Francisco played on Thursday night, so he will have a few extra days to recover before the team’s Week 7 game against the Kansas City Chiefs. There was also talk recently of McCaffrey returning sooner than expected.