By Zach Koons Unfortunately, the bout didn’t prevent Allen from leaving Boston in 2012. View the original article to see embedded media. NBA championship teams often need great chemistry to be the last team standing in any given season. However, the 2008 Celtics title roster had their fair share of bumpy relationships during the height of their success. Infamously among those who went through their ups and downs in Boston were Ray Allen and Rajon Rondo. The backcourt duo played for the Celtics from 2007 to ’12 and were crucial pieces on the ’08 championship roster, but a rift reportedly existe…