No future Astros, only former Astros with birthdays today ~
RHP Jay Powell (41)
Drafted by the Orioles in the first round in 1993, Powell came to Houston in a July 1998 trade with the Marlins. He pitched in 160 games for Houston in 1998 to 2001 with an ERA of 4.02 and WHIP of 1.549. He was the winning pitcher of record in Game 7 of the 1997 World Series for the Marlins.
OF Stan Javier (49)
Javier came to Houston in an August 1999 trade with the Giants and played in 20 games for the Astros that season with a batting line of .328/.405/.422. Javier was the first player to hit a home run in an interleague game (against the Rangers) when he played for the Giants. He got his World Series ring when he played for Oakland in 1989.
RHP T. J. Mathews (43)
Originally drafted by the Cardinals in the 36th round in 1992, Matthews signed with Houston as a free agent in January 2002 and pitched in 12 games for the Astros that season with an ERA of 3.44 and WHIP of 1.309.