By Michael Shapiro The Dodgers’ superstar has 11 years left on his contract, but already he has Cooperstown on his mind. Welcome to The Opener, where every weekday morning during the regular season you’ll get a fresh, topical column to start your day from one of SI.com’s MLB writers. Mookie Betts is a man on a mission as he continues his ninth MLB season. The 2018 AL MVP and two-time World Series champion didn’t mince words in a recent conversation with Sports Illustrated, highlighting his ultimate individual goal for his career: “I want to one day have a Hall of Fame speech,” Betts says. “Pre…