Mike Conley said Celtics head coach Joe Mazzulla put him in charge of Boston’s substitutions for their preseason game against the Hornets: "Joe approached me before the game and said, 'What would you think about doing the rotations tonight?' I was like, 'Sh*t, I'll do whatever.' I told him I had never done that before and it was cool for me to experience that... It's a lot harder than you think. You're trying to follow a strict regimen, but then you look up and a guy is winded. Or a guy maybe made 4 or 5 buckets in a row, and it's like, I don't want to sub him out yet. It's just feeling out the game." (nytimes.com/athletic/7691834…)