The Warriors finished Saturday's loss in Oklahoma City with eight healthy players.
Golden State entered the game against the Thunder with nine active players, but big man Omari Spellman sprained his left ankle in the first half and didn't return in the second half.
The injury occurred with just over five minutes remaining in the first quarter when Spellman appeared to tweak his left foot on a drive to the basket.
He stayed in the game and finished with four points and three rebounds in 12 minutes.
When the third quarter began, the Warriors deemed Spellman questionable to return, but he never came out of the locker room.
Without Spellman, the Warriors went on to lose 114-108 to the Thunder.
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Just 15 minutes before tip-off in Oklahoma City, the Warriors ruled rookie Eric Paschall out with a right hip contusion.
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Paschall and Spellman join Steph Curry, Draymond Green, Levon Looney, Jacob Evans, Klay Thompson and Alen Smailagic as the Warriors currently dealing with injuries.
The two forwards have a couple of days to recover as the Warriors don't play until Monday night when they host the Utah Jazz at Chase Center.
