Pregame: Bradley out for Game 6

PHILADELPHIA -- Boston Celtics shooting guard Avery Bradley (shoulder) is out for Game 6 of an Eastern Conference semifinal series against the Philadelphia 76ers. Ray Allen is back in the starting lineup in his place.

Bradley, who has dislocated his left shoulder on three occasions this postseason, including twice in this series, sat out Game 5 and will miss Game 6 as he's experienced little progress in recovery. Rivers is uncertain of Bradley's status moving forward, noting it's a, "tough injury."

Added Rivers: "We keep saying day-to-day, but we really don't know."

Allen isn't exactly the picture of health as he's battling bone spurs in his right ankle. But after sitting out the first two games of the postseason, he has been able to play through the pain ever since. Rivers acknowledges that neither shooting guard is likely to get better until after the season (when surgery seems likely for both).

A couple other notes from pregame:

* Asked about his team's mood, Rivers playfully noted, "I don’t ever know. I tell you, I’m the worst. I swear to gosh, I wish I could predict. I get more guys (saying), 'What do you think?’ Hell if I know. If I knew we were going to win, I’d just shut up and not say a word. But I don’t know, so we’ll see."

* Rivers said part of the reason his team has been so successful despite the ups and downs is that it came in prepared to scrap. "I think they fully understood that every series was going to be a grind, nasty series, and I think it does help us understanding that, instead of being surprised by that," said Rivers. "I think that's been the one good thing. Going into the Atlanta series, we talked about it -- we understand who we are and we don’t have a big margin of error."