Celtics fans have seen some spectacular offensive moves from Isaiah Thomas in his half a season with The Green after he came to Boston in a trade with the Phoenix Suns.
How about his defense?
Watch as the 5-foot-9 point guard from Tacoma, Wash., blocks the dunk attempt of the Houston Rockets' 6-8 Trevor Ariza in a Drew League summer pro-am game in Seattle.
h/t Ballislife.com and YouTube
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