On April 9, 1962, Major League Baseball was welcomed to Houston as the Colt .45s rolled down Main Street in a parade. The name wouldn't last long. Due to a lawsuit by the Colt 45 firearms company, Judge Roy Hofheinz announced the team's name change to the Houston Astros at the end of 1964. Before joining the MLB, Houston's minor league team was the Houston Buffaloes. MORE How Union Station became Astro’s home