The home runs were number's 2 and 3 of the season for Fielder, after clubbing 50 all of last year.
Cole Hamels took the loss (2-3), despite striking out a season-high 11 Brewers hitters.
Mitch Stetter pitched scoreless seventh and eighth innings to get the win for the Brewers.
Derrick Turnbow worked the ninth for his 1st save in a year.
The Brewers close out the 2-game series with a day game today.