After a strong start to Thursday Night Football against the Seattle Seahawks, breakout running back Jordan Mason left the game in the second quarter.

After a 14-yard run, Mason appeared to be in pain on the Seattle field. After being looked at on the field, Mason left the game and went back to the locker room with the 49ers training staff in Seattle.

According to Amazon’s Thursday Night Football broadcast, Mason went back to the locker room to have his shoulder examined and is questionable to return against the Seahawks.

Via @nwagoner on Twitter:

#49ers RB Jordan Mason is having his shoulder examined, according to the game broadcast.

— Nick Wagoner (@nwagoner) October 11, 2024

Before leaving the game, Mason rushed eight times for 65 yards and added one catch for nine yards against the Seahawks. Rookie Isaac Gurendo and Deebo Samuel will likely handle the running back duties until Mason can return.

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