The Rockies were on the doorstep of a rare three-game winning streak, but the majors’ worst bullpen reverted to the typical script instead. Nick Mears and Justin Lawrence combined to yield two runs in the ninth in a frame that featured two walks and a hit by pitch. That messed up Colorado’s well-pitched game to that point and gave the Brewers a 4-3 comeback win on the second night of the series on Tuesday at Coors Field. “Anytime you walk guys in the ninth in a one-run game, you put yourself in peril,” manager Bud Black said. Mears’ blown save negated a strong outing by starter Ryan Feltner and wiped away another good night at the dish by Brenton Doyle, who homered and had an eighth-inning RBI double to give Colorado a short-lived lead. “It’s frustrating,” left fielder Nolan Jones said.