Welcome to Sliders, a weekly in-season MLB column that focuses on both the timely and timeless elements of the game.NEW YORK – Ask Sam Antonacci if it hurts to be hit by a pitch, and he looks at you as if the question makes no sense.“No,” he said, impassively. “Not really.”Fear of the baseball — the very rational anxiety that drives away so many hopefuls when the pitching gets tough — does not compute for Antonacci, a rookie pest for the upstart Chicago White Sox. The franchise dates to 1901, and in all that time, no player in the major leagues has been hit by a pitch so often in so few games.It took Antonacci only 48 games to be plunked 15 times. He flinched just once, on June 7 in Philadelphia, when the Phillies’ José Alvarado drilled him on the elbow guard with a 100-mph fastball. Antonacci needed a minute to collect himself and assure the manager and trainer he was fine.Otherwise, he has been an expert in “Tubthumping”: he gets knocked down, but he gets up again. Off the shoulder at 97 mph, off the calf at 93, a cutter to the hip, a sweeper to the kneecap, no problem. Antonacci was recently drilled in four consecutive games, and achieved a franchise first by getting hit twice in the same inning on May 22.