SAN DIEGO — The question never fully formed before Bud Black snapped it off. “I know it’s early and you haven’t figured out a postseason rotation, but …” the Rockies’ manager was asked, almost. “Way too early,” Black interrupted. “… is he a guy who …” “No. Way too early.” Black knew the question was about Chad Bettis, the senior member of Colorado’s pitching staff, the right-hander who returned from cancer in August and quickly grounded a rookie-heavy rotation.