Hi Happy, a Group 1 winner in his native Argentina early in his career, posted his first U.S. victory and did so in style, with a convincing 2 3/4 length victory over a Grade 1 caliber field in the Grade 2 Pan American.  The pace setting One Go All Go held on to finish second over Classic Covey with Grade 1 winners Sadler's Joy and Bigger Picture who finished fourth and seventh respectively. Hi Happy was transferred to trainer Todd Pletcher's barn after going winless in four previous U.S. starts last winter and spring on the west coast. He was ridden to victory by Luis Saez.