VIDEO: Celtics’ 5-9 Thomas blocks 6-8 Ariza’s dunk

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