Celtics coach Joe Mazzulla has attended Patriots practice multiple times over the past few years.
He has been at training camp with Bill Belichick and has attended meetings with Jerod Mayo.
“Joe’s been great,” Mayo said. “I think I told you guys, Joe and I, before he became the head coach, we had a relationship. He would sit in the defensive meetings and we would talk about philosophical things, philosophy. Team sports are team sports. It’s great.”
Mazzulla spoke about what he learned from those defensive meetings earlier this week.