BOSTON (CBS) — When the Celtics take the floor in Oklahoma City on Wednesday night, they’ll have a difficult time picking up a win against the NBA’s best team. In fact, they’ll have a hard time just getting enough bodies on their bench.

Already without Rajon Rondo (suspension), Kevin Garnett (personal matters) and Brandon Bass (knee), the Celtics lost two more big men on Monday night due to injury. Jermaine O’Neal left the game with a wrist issue, followed by Chris Wilcox suffering a strained thigh muscle. O’Neal and Wilcox played 19 and 13 minutes, respectively, in the 89-73 loss to the Mavericks.

The loss put the Celtics at 15-16 on the season, under .500 for the first time since the end of January.

“I’m scared to talk to the medical staff because they don’t give me good news,” coach Doc Rivers said Monday night, according to The Associated Press. “We’ve got to hold the fort until we get bodies back.”