In the first month of his rookie season, which began when he was just 20 years old, O.J. Mayo averaged 23.1 points per game, shot 42.1 percent on 3s, and generally looked like the kind of guy you'd be happy to have traded Kevin Love to acquire. He wasn't a brilliant playmaker, perhaps, or a world-class guy athletically, but at worst he looked like he'd be one of the best shooters in basketball for the next decade or so.