It is still too early to tell whether or not Kendrick Perkins will play on Sunday. But even if he does how much should the Celtics expect from him? Basketball, particularly the way Perk plays it, is a physical game. The degree of difficulty rises significantly with an ailing shoulder. And since Scot Pollard is out for the year and Gabe Pruitt is a guard, could Brian Scalabrine get the call?