Boston Celtics head coach Joe Mazzulla calls to his players during the second half of Game 2 of the NBA Finals basketball series against the Dallas Mavericks, Sunday, June 9, 2024, in Boston. (AP Photo/Steven Senne)
Boston Celtics head coach Joe Mazzulla watches from the bench during the first half of Game 4 of the NBA Eastern Conference basketball finals against the Indiana Pacers, Monday, May 27, 2024, in Indianapolis. (AP Photo/Michael Conroy)
Boston Celtics coach Joe Mazzulla calls to players during the first half of Game 1 of the basketball team's NBA Finals against the Dallas Mavericks, Thursday, June 6, 2024, in Boston. (AP Photo/Charles Krupa)
Boston Celtics head coach Joe Mazzulla watches play during the second half in Game 4 of the NBA basketball finals against the Dallas Mavericks, Friday, June 14, 2024, in Dallas. (AP Photo/Julio Cortez)
Boston Celtics head coach Joe Mazzulla, center, talks with his players during the first half of Game 2 of the NBA Finals basketball series against the Dallas Mavericks, Sunday, June 9, 2024, in Boston. (AP Photo/Steven Senne)
Boston Celtics head coach Joe Mazzulla, left, and assistant coach Sam Cassell react during the first half in Game 3 of the NBA basketball finals against the Dallas Mavericks, Wednesday, June 12, 2024, in Dallas. (AP Photo/Tony Gutierrez)
Boston Celtics head coach Joe Mazzulla signals to players during the first half in Game 4 of the NBA basketball finals against the Dallas Mavericks, Friday, June 14, 2024, in Dallas. (AP Photo/Julio Cortez)
Boston Celtics head coach Joe Mazzulla celebrates with forward Jayson Tatum, left, after Game 4 of the NBA Eastern Conference basketball finals against the Indiana Pacers, Monday, May 27, 2024, in Indianapolis. The Celtics won 105-102.(AP Photo/Michael Conroy)
Boston Celtics head coach Joe Mazzulla, center, speaks to his players during a timeout in the first half of Game 5 of the NBA basketball finals against the Dallas Mavericks, Monday, June 17, 2024, in Boston. (AP Photo/Charles Krupa)
Boston Celtics head coach Joe Mazzulla arrives at American Airlines Center prior to Game 4 of the NBA basketball finals against the Dallas Mavericks, Friday, June 14, 2024, in Dallas. (STF Photo/Julio Cortez)
Boston Celtics coach Joe Mazzulla calls to players during the first half of Game 1 of the basketball team's NBA Finals against the Dallas Mavericks, Thursday, June 6, 2024, in Boston. (AP Photo/Charles Krupa)