Thunder head coach Mark Daigneault said Tuesday that Williams has a hamstring strain and will re-evaluated in a couple weeks, Clemente Almanza of USA Today reports.
Williams suffered his injury in practice, according to Rylan Stiles of FanSided.com. With Williams sidelined and with the Thunder dealing Jeremiah Robinson-Earl to the Rockets on Tuesday, Olivier Sarr could have a clear path to opening the season as the top backup behind starting center Chet Holmgren.