White Sox rookie Yermín Mercedes says he's leaving baseball after demotion: 'It's over' | CBS Sports Headlines White Sox rookie Yermín Mercedes says he's leaving baseball after demotion: 'It's over' The 28-year-old rookie had been one of the biggest stories in baseball early in the 2021 season ESN FeedsThis post … Continue reading White Sox rookie Yermín Mercedes says he's leaving baseball after demotion: 'It's over'