Inside Donovan Mitchell’s sacrifice that has helped the Cavs become the NBA’s best team

CLEVELAND, Ohio — Inside a quiet locker room at Boston’s TD Garden last spring, as other players were still trying to process a promising season that was coming to an end, injured Cavs star Donovan Mitchell pulled young Evan Mobley aside.

Mitchell wanted to deliver one final message before heading into an uncertain summer.

It is who you are. This is who you should be.

About an hour earlier, Mobley was putting the finishing touches on one of his best, most complete games as a pro.