One of the best rotations in baseball could carry the San Francisco Giants a long way this season, especially with the addition of a much-needed, albeit expensive closer. The ace of that powerful staff, Madison Bumgarner, gets the opening day start Sunday against Arizona in the debut of new Diamondbacks Torey Lovullo. Zack Greinke starts for Arizona and surely hopes this opening day goes a lot better than his did in his desert debut a year ago.