Through three preseason appearances, the Thunder inserted Hartenstein into its lineup as both a starter and a reserve. Hartenstein, a skilled bruiser who was meant to aid in OKC’s rebounding and playmaking efforts,

However, this injury puts OKC in a precarious situation to start the season. Before the preseason began, the Thunder announced last year's back up center Jaylin Williams and small ball five Kenrich Williams were out for exhibition play with a hamstring and knee injury respectively.

Hartenstein signed a three-year, $87 million contract (with a team option in Year 3) with the Thunder in July. It was one of the most significant signings of the summer -- he was