TORONTO – Anonymous Astros shuffle through dark stadium tunnels, linger around quiet hitting cages or wait inside a cramped visitor’s clubhouse for another game to begin during a long, lost season. Third-base coach Dave Trembley answers the darkness with nothing but positive light and attacks. “Hey, how ya doin’?” “Hey, how’s it going today?” “Hey, hey, hey. We’re looking good, looking good. It’s gonna be another good one tonight, isn’t it?” The sentences end with question marks. They’re said with pure exclamation. Brief, upbeat, pregame queries from a 61-year-old who has devoted more than half his life to a sport that once nearly broke him. A cruel, unforgiving Astros-like rebuild [...]