DES MOINES, Iowa (AP) -- So sore for so long, Tyson Gay is sometimes leery of digging deep and testing out that surgically repaired hip. In a race between a fellow thirty-something, he really had no choice. Down early against Justin Gatlin after a slow start, Gay had ground to make up. So, he cranked it up a level. The hip responded just fine. And with it any doubts about Gay's health instantly vanished as he roared back to beat Gatlin to capture the 100 meters on Friday night at the U.S. championships. Gay finished in a time of 9.75 seconds, the fastest in the world this season. Gatlin, wearing a support bandage on his tweaked right hamstring, wound up in second. Charles Silmon took third as he held off Michael Rodgers by two-thousandths of a second for the last spot on the team headed to Moscow for the world championships in August. "That," Gay said, his grin growing wider, "went good." Indeed.