BALTIMORE — The Tigers have their new boss. The Tigers have hired San Francisco Giants general manager Scott Harris as president of baseball operations, a source confirmed Monday to The Detroit News. The news was first reported by ESPN’s Jeff Passan. Harris, 35, has been the general manager of the Giants for three seasons after serving multiple roles in the Cubs baseball operations department for seven years under Theo Epstein and Jed Hoyer. The Cubs played in the postseason for four straight years during his tenure and won the 2018 World Series. The Tigers have not yet announced the hiring. _…