The Astros transferred Hader (biceps) to the 60-day injured list Friday.
The Astros needed the spot on the 40-man roster to select Peter Lambert's contract from Triple-A ahead of Friday's start against St. Louis. With Hader being transferred to the 60-day IL, he won't be eligible to pitch until late May. Hader threw his first live batting practice Tuesday, essentially marking the start of his spring training.