The Cardinals were able to claim their third consecutive division championship despite finishing the regular season 83-78 -- the lowest number of victories for a division winner. St. Louis heads to San Diego for their first playoff game Tuesday.
Fielder had a first-inning, two-run home run -- his 28th of the season -- to send the Brewers off in Sunday's game. Geoff Jenkins added a solo shot in the inning and Cory Hart tripled and scored on a David Bell single as St. Louis spot starter Anthony Reyes (5-8) lasted just two-thirds of an innings.
Milwaukee, which ended the season with a 75-87 record, added a run in the fourth with a home run by Mike Rivera.
St. Louis scored all its runs in the ninth on solo home runs, with Chris Duncan and Albert Pujols hitting home back-to-back shots off Milwaukee starter Carlos Villanueva (2-2). Scott Spiezio had the third Cardinals' homer.