Perhaps the most appealing part of Mitchell's profile, particularly early on in his career, lies on the defensive end. Two years under Rick Pitino has benefited him greatly in this regard, as he's emerged as a multi-positional stopper who a coach can sic on point guards, shooting guards and even some small forwards and expect results. Mitchell has outstanding physical tools to get the job done, with his elite length, chiseled frame and quick feet, but also the mentality, as he's a highly competitive guy who is willing to pick up full court, get on the floor for loose balls, and generally make life difficult for opposing players. Mitchell has outstanding instincts off the ball, as evidenced by his 2.6 steals per-40 (#1 among all DX Top-100 prospects). Despite not possessing great height, his 6'10 wingspan is very difficult for opposing guards to shoot over, and he does a great job of getting underneath defenders, sliding his feet and using his strength to contain the ball.