No future Astros, only former Astros with birthdays today ~
LHP Pedro Martinez (44)
Martinez came to Houston in a December 1994 trade with the Padres and pitched in 25 games for the Astros in 1995 with a 7.40 ERA and a 2.177 WHIP. In two seasons with the Padres he was 6-3 with a 2.73 ERA and a 1.301 WHIP in 80 appearances.
LF Mike Easler (62)
A 14th round pick by Houston in 1969, Easler had precisely one hit for the Astros in 29 plate appearances spread over 26 games from 1973 to 1975 before being traded to the Cardinals in June 1975. He went on to have a successful career playing for Pittsburgh, Boston, the Yankees and Philadelphia compiling a career batting line of .293/.349/.454. He was an All-Star for the Pirates in 1981.
SS Jason Alfaro (35)
Originally drafted by Houston in the 22nd round in 1997, Alfaro's entire major league career consisted of 12 plate appearances over seven games for the Astros in 2004, hitting .182. In nine minor league seasons, he hit .273/.318/.407.