No future Astros, only former Astros with birthdays today ~
2B Nellie Fox (died December 1, 1975 at 47)
Fox came to Houston in a Deccember 1963 trade with the White Sox and played in 154 games for the Colt .45's and the Astros in 1964 and 1965 at the end of his career, hitting .265/.317/.319. A 12-time All-Star, three-time Gold Glove winner, and 1959 AL MVP, Fox was voted into the Hall of Fame by the Veterans Committee in 1997.
IF Julio Gonzalez (60)
Gonzalez came to the Astros in a December 1976 trade with the Cubs and played for Houston from 1977 to 1980, hitting .235/.270/.288 in 296 games.
OF Telmanch "Ty" Gainey (52)
Drafted by the Astros in the second round in 1979, Gainey played in 57 games for Houston from 1985 to 1987, hitting .216/.293/.288.
CF Willy Taveras (31)
Taveres was drafted by Houston from Cleveland in the December 2003 Rule 5 draft and played for the Astros from 2004 to 2006, hitting .284/.329/.340. In 2005, he came in second in Rookie of the Year voting to Ryan Howard. In December of 2006, Tavares was included in a trade to the Rockies for he-who-must-not-be-named.