Racing PositionsBaseball's next superstar? Bobby Witt Jr.'s rise to MLB's top tier1hJeff PassanYankees' Rizzo (arm) set to undergo more testing7hJorge CastilloD-backs' Carroll to undergo MRI on ailing side11hEx-infielder, coach Brumley killed in crash at 619hYankees prospect Dominguez (left side) off to IL9hJorge CastilloBetts breaks hand on HBP in 'big blow' to Dodgers11hPhillies-Orioles pauses for Fleet Week flyovers13hAstros RHP Blanco pulled after 7 amid no-hit bid14hPhillies' Thomson ejected in 8-3 loss to Orioles14hPadres' Machado, Shildt tossed for arguing call13h