No future Astros, only former Astros with birthdays today ~
C Bob "Scrap Iron" Stinson (67)
A first round pick by the Dodgers in 1966, Stinson came to Houston in a trade with the Cardinals in November 1971. In 27 games during the 1972 season, he hit .171/.211/.200.
RHP Gregg Olson (46)
Originally drafted by Baltimore in the first round in 1988, Olson was Rookie of the Year for Baltimore in 1989 and an All-Star in 1990 before coming to Houston in an August 1996 trade with Detroit. Olson pitched in only nine games for the Astros in 1996 with a 4.82 ERA and a 2.036 WHIP.
IF Ty Wigginton (35)
A 17th round pick by the Mets in 1998, Wigginton came to Houston from Tampa Bay in a trade for Dan Wheeler and played primarily at third base. His lifetime line over 11 seasons is .263/.324/.438. In Houston, he was .285/.347/.506. In addition to Houston and Tampa Bay, he has also played for the Mets, Pirates, Orioles (2010 All-Star), Rockies and most recently the Phillies.