Tayshaun Prince and Rajon Rondo are close friends and played at the same college, so even though Rondo's knee injury leaves the Boston Celtics in a precarious position which could aid the Detroit Pistons' playoff chances, Prince was feeling particularly blue. "I feel extremely bad, man," Prince said after Sunday's 104-102 win over the Orlando Magic. "I was thinking about that all day, man. They're in the eighth spot in the playoffs and obviously teams that are ninth, 10th, 11th, 12th, or whatever, are chasing Boston. But you don't want to chase them like that, man." Rondo is out for the season with a torn right anterior cruciate ligament, the Celtics announced Sunday. The Pistons trail the Celtics by just four games in the chase for the eighth and final playoff spot in the Eastern Conference. "Obviously, I didn't have a chance to play with him at Kentucky but we talk a lot in the summer time and play pick-up, stuff like that," Prince said. "It's just unfortunate for a guy that's a great leader. And obviously, we all know what he does for his team, getting guys involved and stuff like that. So their other guys are going to have to step up." Pistons coach Lawrence Frank was an assistant with the Celtics for one year. He said Rondo's injury would not have a direct bearing on when and if he decides to tinker with the Pistons' lineup in the second half of the season.