Milwaukee excelled at home during the regular season, setting a franchise record by going 57-24, and that success has carried over into the postseason.
The Brewers won all three games at home against the Arizona Diamondbacks in the NLDS, including a 10th-inning victory in Game 5 on Friday. Nyjer Morgan's game-winning RBI single gave the Brewers their first postseason series win in 29 years.
Ryan Braun added a two-run homer and four RBI on Sunday for Milwaukee, which is in a League Championship Series for the first time since 1982 when it beat the Angels in the ALCS before falling to St. Louis in the World Series.
The NL Central-champion Brewers handed the ball to Zack Greinke (1-0), who gave up six runs on eight hits over six-plus innings. Greinke was a perfect 11-0 in 15 home starts during the regular season.
David Freese hit a three-run homer for the Cardinals, who shocked the baseball world by taking out the 102-win Phillies in the NLDS with a heart-pounding 1-0 win in Game 5 on Friday.
Jaime Garcia (0-2) allowed six runs on six hits over four-plus innings to take the loss.