As maligned as the Brewers pitching has been lately, it's the offense that has been more the cause of the month long slump. The team scored almost two fewer runs per game in the last 30 games as they did in the first 30:
Would you have guessed that Corey Hart and Rickie Weeks would be #1 and #2 on the team in home runs at this point in the season?
Ryan Braun has not hit a home run for 15 games. Last year he had streaks of 19, 17, and 14 games without a home run and still hit 32 on the season, but he's already 5 behind last year's pace.
Prince Fielder didn't hit a home run until game #17 last year, yet this year he is already 6 home runs behind last year's pace.
As I've said before, it's the superstars on your team that determine success or failure. The Brewers two biggest superstars are not living up to that status right now, and that has as much to do with the 10-game under .500 record as the whole pitching staff put together.