CHICAGO — Grady Sizemore’s playing career ended prematurely, a cascade of injuries and surgeries leading him to hang up his cleats at 33 years old after the 2015 season. He didn’t initially see coaching as the path for himself — “definitely not” — but in conversations with some current players, he realized he had the itch to get back in the game. Sizemore, a two-time Gold Glove Award winner ...