Siyar Bahadurzada (Persian: سیار بهادرزاده; born 17 April 1984) is a retired Afghan-born Dutch mixed martial artist who competed in the Welterweight division of the Ultimate Fighting Championship. He currently works as an instructor for Evolve MMA in Singapore. A professional competitor since 2001, he had also competed for World Victory Road, RINGS, and for Shooto, in which he held the title of Shooto Middleweight Champion.