Boston Celtics Glen Davis (R) makes contact with Detroit Pistons defender Rasheed Wallace in the second quarter during Game 4 of the NBA Eastern Conference Finals in Auburn Hills, Michigan May 26, 2008.  (Xinhua/Reuters Photo)

Detroit Pistons Rasheed Wallace (R) is congratulated by head coach Flip Saunders (L) as he runs past the bench after scoring against the Boston Celtics in the first quarter of Game 4 of the NBA Eastern Conference Finals in Auburn Hills, Michigan, May 26, 2008. Pistons beat Celtics 94-75. (Xinhua/Reuters Photo)