If the Cincinnati Reds can figure out how to use him at the right time, red-hot reliever Aroldis Chapman could make a real difference for them in the playoffs. Friday night, Dusty Baker brought Chapman in the seventh inning — one batter after the San Diego Padres took the lead for good, en route to a 4-3 victory. No matter, the Reds post-season ticket was punched as soon as the St. Louis Cardinals decided they didn’t want to beat teams with losing records. Back to the real story, Chapman’s speedball. During Friday’s contest the Cuban threw 25 pitches in 1 1/3 innings and ALL exceeded 100-mph, with one fastball to Padres centerfield Tony Gwynn setting a major league record of 105-mph.