Last season, the Boston Celtics did a great job of making up for their lack of size with phenomenal small ball lineups. They have after looked for versatility in their defenders and athletes, and that gives them the flexibility they need to be undersized on the defensive end. Last season, it was Jae Crowder and Evan Turner that had the most responsibility, with expectations to guard true bigs in the four. Nothing will change for Crowder this season, but it is rookie Jaylen Brown that will be the key to replacing Turner’s defensive versatility.