PITTSBURGH — Rafael Devers held the pose. He did not hold the baseball.The San Francisco Giants first baseman stretched to receive a throw from third baseman Osleivis Basabe, whose diving stop saved the game for a fleeting moment with two outs in the ninth inning Tuesday night. Basabe gathered himself, set his feet and had plenty of time but made a noodle-armed throw that arrived on a bounce.There’s no mistaking it was a poor throw, but the hop was long and true enough. It was the kind of throw fungo bat-wielding coaches simulate thousands of times in pregame infield practice.Devers made a stabbing attempt. The ball got past him. The Pittsburgh Pirates scored the winning run in a 13-12 affair that had enough strangeness to be memorable but only a cult audience would appreciate as an instant classic.The dam-breaking deluge wasn’t the game anyone expected with Paul Skenes and Logan Webb as opposing forces on the mound. But Devers hit a three-run homer as the Giants hung five runs on the Pirates’ reigning NL Cy Young Award winner.Webb coughed up that lead while giving up a career-high nine runs and allowing all seven batters he faced in the third inning to reach safely. Then the Giants’ rookie-festooned lineup combined purpose with patience while chipping at a six-run deficit and erasing the last of it in the eighth.It all amounted to yet another one-run loss. The Giants are 11-25 in one-run games this season, and they’ve come in every stripe and color. They’ve been on the wrong end of a pitcher’s duel. They’ve been outfoxed in extra innings. More commonly, their bullpen has been unable to hold leads, especially on the road. Their 10-9 loss to the Cincinnati Reds last Wednesday included the largest blown lead (six runs) in the ninth inning in franchise history.Now add this crayon to the Giants’ box of one-run sadness: a spirited, six-run comeback they couldn’t celebrate; an error that belonged to Basabe but could have been prevented; and the Giants’ first loss when scoring 12 or more runs in almost two decades.According to Justice delos Santos of the San Jose Mercury News, the Giants hadn’t scored a dozen in a defeat since Sept. 22, 2006, when Barry Bonds hit his 733rd career home run in a 13-12 loss at Milwaukee.