When the White Sox signed Seranthony Dominguez in January, they anticipated him closing a lot of games for them. They didn’t give him a two-year, $20 million contract for mop-up duty. Dominguez expected to be the closer, too. But more than three months into his deal, he not only isn’t closing, he isn’t pitching in high-leverage, late-game situations. He’s tied for second in the major leagues with five blown saves, and his 4.85 ERA would be the worst of his career. “It’s a hard moment for me righ