Jon Lester retires: All-Star lefty who helped Cubs end title drought calls it a career after 16 MLB seasons | CBS Sports Headlines Jon Lester retires: All-Star lefty who helped Cubs end title drought calls it a career after 16 MLB seasons Lester, 38, finished his lengthy career with exactly … Continue reading Jon Lester retires: All-Star lefty who helped Cubs end title drought calls it a career after 16 MLB seasons