Outside of Rajon Rondo, Green may be the best player on the 2013-14 Celtics. He’s also somewhat mysterious. He’s never been the best player on a team, and he’s a 6-foot-9-inch player with a career rebounding average of 5.2. He averaged just 3.9 rebounds per game last season. By contrast, the 6-foot-7-inch Paul Pierce, who has a similar game, has a career average of 6 rebounds. Green has not established himself in the post.