The Celtics have thus far avoided a second-half letdown like the one that hurt them last season, costing them homecourt advantage for most of the playoffs. Rivers acknowledged that the obvious reason is the health of Kevin Garnett , but he noted that there are other factors as well, including having a healthy Paul Pierce .
“People forget, both were injured. Paul Pierce had the knee surgery as well as Kevin Garnett,” Rivers said. “So, I think those two things are the biggest difference. And [Rajon] Rondo is another year [more experienced], playing great. And Ray Allen  is having an unbelievable season. I think all those, in the one basket, is the reason we’re playing well. But the big key is Kevin and Paul.”
Allen gave a fiery speech before Rivers entered the locker room at halftime of Tuesday’s victory over the Kings. Rivers said Allen got everyone’s attention because he’s not normally that vocal.
“Yeah, that was out of the ordinary, for sure. The tone and just the entire speech,” Rivers said. “It was more about playing the right away. And you could hear it. It was at the second unit. He wasn’t mad at the starters. it was all directed to the second unit. The starters came out and played great to start that game, and then the second unit kind of let it go. And it was more how they’re were playing. And that’s what he was frustrated with.”
Reggie Miller  has said he’s cheering for Allen to break his record for most 3-pointers all-time, as Allen is within eight of the former Pacers star and current TNT analyst. However, the hosts said they don’t believe Miller, never known for his graciousness during his playing days, is telling the truth. “No, I don’t believe him, either,” Rivers said. “I’m going to call ‘bull’ on that one with Reggie.”