03/07/2011 08:25 am ET | Updated May 25, 2011

Shaquille O'Neal Out Indefinitely: Celtics Center's Return Remains Uncertain

Nobody knows when Shaquille O'Neal is going to return to the Celtics lineup.

A. Sherrod Blakely of CSN New England reported on Sunday that the Celtics center has "some right foot soreness" and he is now out indefinitely.

"He worked out with us the other day," coach Doc Rivers said. "Some of the pain returned."

Rivers went on to say that Ed Lacerte, the Celtics team trainer, told him "don't expect him anytime soon."

The 39-year-old missed his 13th straight game on Sunday.