Seattle Mariners call up top pitching prospect George Kirby; righty will start Sunday vs. Rays | CBS Sports Headlines Seattle Mariners call up top pitching prospect George Kirby; righty will start Sunday vs. Rays Kirby, 24, is a former first-round draft pick ESN FeedsThis post was originally published on this … Continue reading Seattle Mariners call up top pitching prospect George Kirby; righty will start Sunday vs. Rays