PITTSBURGH — Starling Marte's confidence can be unwieldy. There is nothing the Pirates outfielder thinks he can't do on a diamond. That mind-set potentially cost Pittsburgh a run Saturday against the Giants. A short time later, it won the game. Marte hit a solo home run off George Kontos into the sun-drenched leftfield bleachers with two outs in the ninth inning, lifting the Pirates to a 3-2 victory that felt more like early October than late August. "He's an exciting player," Pittsburgh manager Clint Hurdle said. "He sometimes tries to get some things done and make some things happen." Even when they don't work out. Marte's second career walkoff came two innings after he was easily caught trying to steal third in a tie game. Jung Ho Kang's second solo homer of the game shortly after Marte made his way back to the dugout erased some of the sting, but then again Marte isn't sure there was anything to apologize for. "I'm going to keep doing it," Marte said. "If they give me a base, I'm going to take it." Facing Kontos in the ninth, Marte waited on a fastball and didn't miss it to set a career high with his 16th homer of the season.