For your examination, I present two pitchers.
Both men pitched for the Brewers during their age 27 season. Both men were acquired by the Brewers at a substantial cost in prospects. Both men were expected to lead playoff pushes.
Both men posted higher-than-expected ERAs to begin their age 27 season.
Here are their ERAs after their first nine starts of that season:
One of the pitchers, as I’m sure you’ve guessed, is Zack Greinke.
The other pitcher is CC Sabathia. If you want to learn more about his 2008 season, click on his link.