What have they done?
Like April, the Astros excelled the first half of the month, going 11-4 through May 17. The rest of the month they went 3-9, including an eight-game losing streak. The offense and pitching both declined during the collapse, but given that the staff continued to post a decent ERA, the line-up was chiefly to blame:
Dates R/G ERA --------------------- 5/01-5/17 5.33 3.73 5/18-5/31 4.58 4.78