Roger Clemens was only a Houston Astro for three years, but when he arrived at age 41, he showed everyone that he was far from done yet.  Clemens made an immediate statement in 2004 when he went 18 and 4 and become one of only a handful of pitchers to win the Cy Young Award in both leagues.  Clemens would finish 3rd in Cy Young voting in his second season winning the ERA and FIP title.  His tenure was brief, but his stats were phenomenal.  With Houston, "the Rocket" went 38-18 with 505 Strikeouts and a 2.40 ERA.

Doug Rader was known for his defense and he was a five-time Gold Glove winner at third base.  Playing his first nine seasons in Houston, Rader did not always hit for the best batting average or on base percentage, but he did hit over 100 home runs as an Astro and 1,060 Hits.

A dominating reliever in his day, Billy Wagner would make three of his seven All0Star Games as an Astro, the team he began his career.  Wagner would accumulate 225 Saves with 1.039 WHIP and would finish 4th in Cy Young Voting in 1999, which would be the year he won his lone Rolaids Relief Pitcher of the Year Award.

Used both as a starter and a reliever during his decade in Houston, Ken Forsch was adept at both roles.  As an Astro, Forsch put together a record of 78 and 81 with 50 Saves.  He was named an All-Star in 1976 and in 1979 would lead the National League in WHIP.