Joe Mazzulla leaped from station-to-station at practice this week, greeting legends like Satch Sanders, involving Paul Pierce, Eddie House and new assistant Sam Cassell in shooting contests. Their trash talk, flying expletives and large personalities filled a quieter, sometimes nervous gym after four significant departures and numerous new faces joined the team. Mazzulla decided, for that reason in part, to organize groups at this year’s training camp, rather than having individual players work with one coach and forming a narrow mindset. He’s preaching flexibility with this roster.