The first one happened in 1993 when Doc Rivers played with the Knicks. What was first thought to be a left knee sprain turned out to be a season-ending ACL injury.
Doc took a tumble ud83eudd23 pic.twitter.com/bG35lUynxz
This one happened last night when the Clippers took on the Mavericks. Doc jumped up to argue a no-call with the referees and landed on the floor. You can see Rivers grab that left knee. Doc is concerned that he may have torn that same ACL, but nothing definite on that yet.