Joe Mazzulla has surged to a dominant 97.2% implied probability in the NBA Coach of the Year market because the Boston Celtics exceeded sharply lowered preseason expectations amid significant roster turnover and Jayson Tatum’s extended Achilles injury. Despite losing key contributors like Kristaps Porzingis, Jrue Holiday, and Al Horford in the offseason, Mazzulla maintained elite offensive and defensive efficiency, secured the Atlantic Division title, and positioned Boston as a top Eastern Conference seed. The market’s wisdom of crowds now reflects this sustained performance over dramatic turnaround narratives for JB Bickerstaff with the Detroit Pistons or Mitch Johnson with the San Antonio Spurs. A shift could still occur if voters prioritize those rebuild stories or if Boston’s playoff results alter perceptions of regular-season impact.