The Astros placed Justin Verlander on the illjured list with a calf injury, but not a major one:

Verlander, who left his last start Sunday against the Baltimore Orioles after three innings with calf discomfort, was officially diagnosed with “fascial disruption, but no muscle fiber disruption.’’ 

In layman’s terms? 

“This was relatively good news is my understanding,’’ Astros GM James Click said. “Our hope and expectation is that this should be relatively short-term.’’ 

MSN.com

He probably won’t win twenty games, but he should pitch enough innings to qualify for the ERA title. I’m sure the Astros will give him enough time to get healthy for the playoffs.