No future Astros, only former Astros with birthdays today ~
LHP Juan Agosto (54)
Agosto pitched in 261 games for Houston from 1987 to 1990 and in 1993. His best season was in 1988 when he appeared in 75 games and went 10-2 with a 2.26 ERA and a 1.135 WHIP. In 1990, he led the National League in appearances with 82.
RHP Scott Elarton (36)
A first round pick by the Astros in 1994, Elarton pitched for Houston from 1998 to 2001, going 32-21 in 120 appearances (67 starts) with a 4.82 ERA and a 1.388 WHIP before being traded to the Rockies at the trade deadline in 2001 for Pedro Astacio. In 2000, he was 17-7 in 30 starts for Houston.
2B/3B Ken Boswell (66)
A native of Austin, Boswell played in 275 games for Houston from 1975 to 1977 after spending 8 seasons with the Mets. His best season offensively was with the Mets in 1969, hitting .279/.347/.381/.728. In 1970, he led the National League in fielding percentage as a second baseman with a .996 percentage.
C Frank Charles ( 43)
I love this story. Charles toiled in the minor leagues and independent ball for 10 years. At the end of the 10th year, after having been picked up by Houston in the off-season, he got a September call-up, a rookie at 31. In 7 plate appearances over 4 games, Charles got three hits with a double and two RBI's. His cup of coffee netted him a .429/.429/.571/1.000 career batting line. He spent 4 more seasons in the minors and independent league ball before hanging up his cleats at the end of the 2004 season when he was 35 years old.