Celtics captain Paul Pierce missed the second half of practice Tuesday afternoon after aggravating the shoulder injury he sustained in Sunday's game against San Antonio. Pierce's status has not been determined for Wednesday's game against Oklahoma City.
"He got hurt again, it's a stinger," coach Doc Rivers said. "Same exact reaction, looked worse. Eddie (Lacerte) says it's a stinger and if it's a stinger he'll be fine. You get concerned two days, a game and a practice, and the exact same thing happens. He just got picked and he went down so we'll find out.
"You can play a guy five minutes and that can happen. Nothing you can do about that. Good news it's not a shoulder separation, or anything and probably the worst case is he misses a game or two. That's not all bad -- obviously you'd rather have him."
Kendrick Perkins (knee tendinitis) returned to practice and is expected to play against the Thunder.