No future Astros, only former Astros with birthdays today ~
RHP Dave Giusti (73)
Giusti was signed by Houston as an amateur free agent in 1961 and pitched for the Colt .45's in 1962 and 1964 and for the Astros in 1965 to 1968. In 176 games (118 starts), he had a 47-53 record with a 4.02 ERA and 1.284 WHIP. His best seasons were with the Pirates in the early to mid-70's. He had one All-Star appearance and won one World Series while with Pittsburgh.
C Ivan "Pudge" Rodriguez (41)
Rodriguez signed with Houston as a free agent in March 2009. In 93 games for Houston that season, he hit .251/.280/.382 and had a 32% caught stealing rate. In August of 2009, he was traded to the Rangers for Matt Nevarez and Jose Vallejo. Rodriguez was an All-Star 14 times while playing with Texas and Detroit as well as a 13-time Gold Glove winner and a 7-time Silver Slugger. He was the American League MVP in 1999 for Texas. He won his only World Series for the Marlins in 2003.