The Spurs say Splitter had an MRI on Sunday.
Splitter was hurt Saturday night in the fourth quarter of a 116-92 win. He had a season-high 22 points before getting injured charging into Ryan Hollins' chest.
The Spurs visit Memphis on Tuesday night.
The 6-foot-11 Splitter is averaging 8.6 points and 6.2 rebounds in 21.2 minutes this season.