How old was Devonté Graham when Kansas Big 12 title streak began?

Like many on the current Jayhawks men's basketball team, Devonté Graham had just started playing AAU ball when Kansas began its streak of consecutive Big 12 regular-season championships.
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Like many on the current Jayhawks men's basketball team, Devonté Graham had just started playing AAU ball when Kansas began its streak of consecutive Big 12 regular-season championships.