The Bachelor alumnus Andy Baldwin joined an underwear run held in Kona on the Big Island of Hawaii last Thursday. The 30-year-old U.S. Navy hunk wore both a pair of skimpy blue Nike swimming trunks for his early morning swim and a black pair of boxer shorts for the Ironman Underwear Parade, which was organized to helped raise money for charity.

The underwear run will serve as a prelude to the Ford Ironman World Championship, which will be on Saturday in Kona. Andy is set to join the competition which will also be his fifth Ironman competition in six years.

More Andy Baldwin underwear run pictures after the jump.