Mazz came in and Boston became the best offense in the sport and he maintained a top 5 defense. Under Ime they were 7th in offensive net rating (2nd defensive). That Ime year, the expected W/L was 59-23, yet they were 51-31. Mazz's 1st year with a much worse assistant staff, they were 2nd in offensive earing and 3rd for defense. Their expected W/L and the actual record were identical at 57-25. Mazz's 2nd year, they win the title. Either 1st offense and 3rd defense. Expected W/L was 66-16 vs. actual of 64-18. Last year, 2nd and 5th, 62-20 vs 61-21. This year, without Tatum, 2nd and 4th, 59 expected, 56 actuall. Without Tatum, without Jrue, without Al, without Kornet.
Mazz is an excellent coach at getting the best out of a team. He has consistently had a top flight offense and defense. His systems work. The team over achieves while consistently having a ton of roster turnover and injuries. Is he the best coach at drawing up a play on the fly, no, but his system works when the players execute. And the players execute the vast majority of the time.
Excellent and TP.
But, you left out Mazzulla and his staff are some of the best in the league at developing talent. In today's cost conscious NBA, that is huge and one of the reasons for this team's successes. White, Hauser, Pritchard, Kornet, Walsh, Scheierman, Gonzalez, Queta and Harper Jr have all taken major steps forward in the development as players under the time Mazzulla has been head coach.
And as for the "anyone could have won with that talent" critique, yet Ime didn't. We also heard the same criticism about KC Jones and Doc Rivers. Yet, their players hail those coaches as being absolutely necessary to winning their titles.
Joe is not perfect. But he is one of the best basketball coaches in the NBA, maybe top 2 to 3. Enjoy him while he is here because you might get a truly crappy coach replacing him if he goes.