ANN ARBOR, Mich. (AP) - Mitch McGary's back issue remains a bit of a mystery. Michigan coach John Beilein says his sophomore big man is making good progress but remains day to day, with the season opener a couple weeks away. Beilein announced toward the end of last month that McGary had been limited because of a lower back condition. McGary said Thursday at media day that he'd been doing some light shooting, but he's still limited in what he's allowed to do. The 6-foot-10 McGary averaged 7.5 points per game last season as a freshman, but in the NCAA tournament he averaged 14.3 points and 10.7 rebounds, helping the Wolverines reach the national championship game, which they lost to Louisville.