It's been a long time since the Boston Celtics had to embrace an underdog mentality. In fact, the last time the Celtics were fighting off the back foot was when Brad Stevens was still patrolling the sidelines. However, after trading away Jaylen Brown this summer, just one year after losing Kristaps Porzingis, Jrue Holiday, Al Horford and Luke Kornet, the Celtics came into the season with significantly lower expectations than in recent years.

Fortunately for Celtics fans, it appears as though Joe Mazzulla's team has relished those lowered expectations, using it as fuel to help propel them to a 10-2 start to the season. Not only are the Celtics…

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