The stats say the Celtics have been one of the NBA's best teams since mid-December. Their record says otherwise. What's the problem? Joe Mazzulla had a simple and obvious explanation.

When speaking to the media following Boston's loss to the Raptors, Mazzulla admitted that his team isn't reaching its full potential. The third-year head coach noted how the Celtics aren't playing at their best and that improvements are needed if the team wants to keep pace with a chasing crowd.

When Boston needed a stop, the calls the Celtics coach made proved disastrous, and afterward took responsibility for the loss: "I didn't help them close it at the end."