No future Astros, only former Astros with birthdays today ~
2B Bill Doran (54)
Doran was drafted in the sixth round in 1979 by Houston and played nine seasons for the Astros before being traded to the Reds in August of 1990. In 1165 games for Houston from 1982 to 1990, he hit .267/.355/.374. In 1987, he hit .283 while playing in all 162 games and leading the National League in fielding percentage for a second baseman.
2B/SS Rafael Landestoy (59)
Landestoy was signed by the Dodgers in 1972 out of the Dominican Republic and came to Houston in a July 1978 trade. He played for the Astros from July 1978 until he was traded in June 1981 to the Reds. In 372 games, he hit .250/.312/.315. His best season was 1979 when he hit .270 in 129 games.
C Skip Jutze (66)
Originally drafted by the Cardinals in the fourth round in 1968, Jutze came to Houston in a November 1972 trade and played for the Astros from 1973 to 1976. In 191 games, he hit .210/.250/.244.