One night in mid-March, with the NCAA tournament about to begin without him, McGary was hanging out with a group of friends at Michigan. He had a few drinks. Someone offered some marijuana – a common occurrence, he said, on campus.
"I always turned it down," McGary told Yahoo Sports. "But that night I didn't."
Less than two weeks later, McGary "dressed" for the Wolverines' Sweet 16 game against Tennessee. He was never going to play, but coach John Beilein thought the sight of him in maize and blue on the sideline, pumping up his teammates, would add some enthusiasm. Michigan eked out a 73-71 win.
Amid the post-victory celebration, an NCAA representative told McGary that he, of all people, had been selected to undergo a random drug test, even though he hadn't played in months.
A week later, after Michigan was knocked out of the tournament, McGary was contemplating whether to enter the NBA draft or return for his junior season. Coming back would allow him to prove his back was fine and continue enjoying life in Ann Arbor. His play could bolster his NBA draft stock. It was an attractive option.
That's when he was called into a meeting with Beilein and athletic director Dave Brandon. They told him he failed the drug test during the NCAA tournament. Then they informed him of the NCAA's harsh penalty for a first failed test: a minimum one-year suspension from all competition.
If he wanted to play college ball again, it wouldn't be until the 2015-16 season.
"The penalty is a year," McGary said.
No longer was there a debate about his future. McGary will enter the NBA draft by Sunday's deadline, he told Yahoo Sports. He's confident in his future, but says he didn't really have a choice. The NCAA penalty cemented the decision for him.