He's a better player than people in this thread are giving him credit for. Sure, he's under-achieved relative to his high school ranking. Happens. He's still a guy that you can win with at center - virtually all of his offense comes at the rim, but his enormous catch radius contributed a lot to Kentucky's elite offense last season. He's also an elite offensive rebounder.
Defensively, he's a lot like many bigs in that he can be good in some match-ups but not in others. Not the most instinctively sound of defensive players, but in certain match-ups when he can patrol the paint he's a major deterrent at the rim.
I doubt Cal ran him off. Not with Bolden choosing Duke, anyway. Lee will help somebody wherever he goes.