Pierce missed Monday’s game in Minnesota for what the team termed personal reasons. Pierce has missed just two of Boston’s 75 games this season. Pierce was back in the lineup with Avery Bradley , Jeff Green , Brandon Bass  and Chris Wilcox .
Rivers reiterated Wednesday that Monday’s absence and Wednesday’s uncertainty before the game had nothing to do with his right ankle.
Pierce had a wrap on his right ankle late in the fourth quarter against the Knicks on Sunday night but the team said it was just for maintenance and was not a serious injury.
As for Kevin Garnett , Rivers said the big man is working out on his own and testing his left foot. Inflammation in his left foot near the ankle caused him to miss his seventh straight game Wednesday night. The Celtics were 2-4 in the previous six.
“Honestly, I haven’t asked one question about [Garnett’s return],” Rivers said when asked about the end of the two-week timetable. “I don’t even know when two weeks is. Whenever it is, it’s probably coming up, and he’ll play.
“We have a lot of practice days coming up and Kevin’s been working out. He hasn’t lost all his conditioning, but you do lose some when you don’t play.”
The Celtics play Cleveland on Friday in the second game of a four-game homestand that will also see them play Washington and Brooklyn. Rivers said the off days in between the home games will allow for more practices that should help the team work Garnett back into game action, if willing and able.
For more, visit the Celtics team page at weei.com/celtics .