123over The Oklahoman reports that Hartenstein was injured in Tuesday’s win over the Philadelphia 76ers. 123over   

The 26-year-old joined OKC’s frontcourt this offseason, signing a three-year, $87 million deal. 

Career-best average of 11.8 points, 12.2 rebounds and 1.3 blocks. 

Isaiah missed the first 15 games of the season after breaking his left hand during preseason. 123over