11 People who turned their backs on the Celtics

Ray Allen

One could argue Ray Allen is at worst the second-most disliked player on this list behind Kyrie Irving. Though he will forever be part of the Celtics' 2008 championship run, he will also potentially be forever resented by fans in Boston for what he did after helping the franchise take home that championship.

Ray is one of the greatest three-point shooters of all-time. In fact, he was widely regarded as the greatest shooter to ever live until Stephen Curry came around. In 2008, he shot 39% from behind the arc and scored 15.6 points per game in the playoffs to help lift Boston to victory in the Finals. It seemed he was destined to be loved by Celtics fans forever.

But when LeBron James made his infamous move to the Miami Heat in 2010, a budding rivalry between the Celtics and Heat was born. So that made it all the more inexcusable when Allen chose to join Miami instead of re-sign with Boston. Ray actually opted to take less money from his old team's rival than to stay with the Celtics where he would have been able to earn more.

The next season, Allen would hit the series-deciding shot to give the Heat a chance in Game 6 before they went on to take the title from the Spurs in Game 7. His public feud with Kevin Garnett and the rest of of the Celtics' core from the 2008 championship team created a rift that still exists between he and the fanbase.