Racing PositionsCatcher Chris Stewart released by Padres3Y'Pop' science: Your guide to learning a new MLB stat4YSam MillerBraves, Stewart agree on 1-year, $575K deal4YD-backs bring framing into focus with catching switch5YMark SimonThe mystery of the walk-off triple5YSam MillerPirates C Stewart has successful knee surgery6YDodgers fold an ace high, fall on a Clayton Kershaw day6YDoug PadillaPirates call up Stallings, son of Pitt hoops coach6YCubs' Jake Arrieta works his same magic against the Pirates6YJohn Jackson, Special to ESPN.comArrieta's latest gem gives Cubs their latest win6YKen Woolums, ESPN Stats & Information