David Lee (back) has been ruled out of Sunday's game against the Knicks

Lee (back) has been ruled out of Sunday's game against the Knicks, Jay King of MassLive.com reports.

Analysis:

Lee is dealing with back spasms and will miss his second straight game after sitting out Saturday as well. With Lee on the sidelines, both Jared Sullinger and Kelly Olynyk could see a few extra minutes off the bench in his absence. Lee's next opportunity to return will be Wednesday against the Lakers.