Pirates starter Ryan Vogelsong faced a 2-0 deficit before recording an out after Gennett's opposite-field home run in the first inning, and Anderson made the lead hold. He retired 11 batters in a row from the second inning to the fifth, when catcher Francisco Cervelli cut the Pirates' deficit to 2-1 with a solo home run, his first of the season.
With their 69th victory, the Brewers surpassed their total from last season.
MOMENTS THAT MATTERED
Sweet relief: Anderson and the Brewers faced a decisive moment in the sixth, when Andrew McCutchen doubled over center fielder Hernan Perez's head to bring the potential go-ahead run to the plate.