McGee has had some major problems with on-the-ball defense. Opposing centers have a 22 PER when facing off against McGee; that’s like going against Greg Monroe or Al Jefferson every single night. Part of this is due to the rebounding problems discussed above. But McGee is also a poor post defender, giving up 0.94 points per post possession, according to Synergy Sports. If they can help it, Denver would be wise to avoid teams with an elite frontcourt player because McGee has had serious problems when guarding the upper echelon big men. He’s given up an astounding 1.5 points per possession when playing post defense against Dwight Howard, LaMarcus Aldridge, Andrew Bynum, Pau Gasol, Chris Bosh, DeMarcus Cousins, Al Jefferson, and Greg Monroe. As a point of reference, none of those players average over one point per possession in the post this season. The video below shows how McGee has been pushed around by these players.