Kratz hit a two-run home run to center field in the fourth inning to score the Brewers’ only runs of the game.
The Brewers’ other offense had a bit more success.
Weston Wilson, Manny Pina and Chad McClanahan had hits in the seventh, while Luis Aviles Jr. and Devin Hairston walked.
Freddy Peralta got the start against the Giants, retiring all three batters he faced during a scoreless first inning.
Brandon Woodruff started against the Reds, walking three in a scoreless first inning.
Burch Smith, Daniel Brown, Zack Brown, Miguel Sanchez, Angel Perdomo, Tristan Archer and Nate Griep also pitched against Cincinnati.