Phoenix ? Paul Goldschmidt hit a grand slam and tied a franchise postseason record with five RBIs, fellow Arizona rookie Josh Collmenter befuddled Milwaukee batters again and the Diamondbacks stayed alive in the NL division series with a 8-1 rout of the Brewers on Tuesday night.

Goldschmidt, who has made big hits a habit since he was called up from Double-A Mobile on Aug. 1, gave Arizona a 7-1 lead in the fifth with a two-out, opposite-field homer to right off Shaun Marcum after Miguel Montero had been intentionally walked. Montero drove in two runs with a single and double.

With an unorthodox overhand style he says comes from throwing tomahawks as a kid in the Michigan woods, Collmenter limited the Brewers to a run and two hits in seven innings. Corey Hart’s leadoff homer in the third was the only run Milwaukee has scored against the 25-year-old in 21 innings this season.

David Hernandez and closer J.J. Putz each pitched a scoreless inning to complete the three-hitter that quieted, at least for one night, the big bats of the Brewers.

Milwaukee leads the best-of-five 2-1. Game 4 is tonight in Phoenix.

Arizona had a major league-best 48 come-from-behind victories in the regular season but the Diamondbacks were on top from the start as they tried to avoid being swept.