The Arizona Diamondbacks are ready to open the season in familiar fashion: with Mad Bum on the mound. Madison Bumgarner was tabbed by manager Torey Lovullo to make his second straight opening day start for the Diamondbacks on Thursday at San Diego. The 31-year-old four-time All-Star struggled in his first season in Arizona going 1-4 with a 6.48 ERA. But Bumgarner will still lead off a Diamondbacks rotation that includes Merrill Kelly, Caleb Smith, Taylor Widener and Luke Weaver. This will be the seventh opening day start in Bumgarner’s career. The Yankees also are setting their rotation, announcing Sunday that Corey Kluber will follow ace Gerrit Cole against Toronto.