Jalen Williams received treatment on his left hamstring after exiting in the 1st quarter of Game 2.
There's no official update via the broadcast but ESPN's Tim MacMahon reported this very recently. The Thunder started Cason Wallace in the 2nd half so needless to say...it does not look ideal for J-Dub playing in the rest of Game 2, let alone Game 3.
EDIT: Jalen Williams (left hamstring strain) will not return tonight.