Different: Fourth-quarter rotation -- No matter the situation, you could count on Doc Rivers to put Rondo, Allen, Pierce, and Garnett on the floor at the end of games. The most memorable role Allen played in Boston was fourth-quarter hero, and without him the Celtics will need to find another. The obvious fit is Jason Terry, but what about Avery Bradley and Courtney Lee? You know Pierce and Garnett will be on the floor, so that's four guards for three spots. Rivers will need to sort it out.