He hasn’t been THAT bad lately.
He’s only had 4 starts since July 1, and his 2 road games were against the Astros (4 ER in 6.1 IP) and Giants (1 ER in 6.1 EP).
Pitching confidently against one of the worst offenses in MLB I would expect runs for the Brewers to be hard to come by. He has a 2.00 ERA in 6 starts against the Brewers, including one earlier this year.