Eleven days have passed since the Astros held their first spring-training workout. The young club has followed first-year manager Bo Porter’’s fiery lead. And the Astros have been fortunate when it comes to health issues.

Only two Astros have dealt with physical setbacks. Reliever Hector Ambriz suffered a sprained foot, while catching prospect Max Stassi was held out of action several days because of an oblique strain. Both have progressed well.

Ambriz threw a light side session Friday, while Stassi swung a fungo bat and has been catching live drills.

The duo are the only players on the Astros’’ 61-man roster who’’ll be limited when the club begins its 2013 spring-training schedule Saturday against Philadelphia in Clearwater, Fla.

Astros right-handed starter Lucas Harrell is expected to throw two innings, matched up versus Phillies left-hander Cole Hamels.

All Astros starting pitchers will initially be limited to two frames, then work toward a five-inning count by their fifth start. Main position players are expected to receive 50-75 at-bats. The Astros’ roster likely won’t receive a first round of cuts until early March. The club plays a 35-game spring schedule, then opens at Minute Maid Park against the Texas Rangers on March 31.