Colt 45’s Primary LogoColt 45’s Alternate LogoEstablished 1962 City Houston League History 2000 – Present / Major League Baseball 1962 – 1999 / National League Team History 1965 – Present / Houston Astros 1962 – 1964 / Houston Colt 45’s Nickname Colt 45’s – The Houston Colt .45s were the first Major League Baseball (MLB) team in Texas, and their …