moore made his major league debut in relief on may 29, 1965 against the minnesota twins. he entered the game in the top of the 9th with the senators behind, 10-7, and gave up one unearned run in his one inning of work. washington scored a run in the bottom of the inning, and the game ended, 11-8. he earned his first big league win on july 23, 1966 by pitching a three-hit complete game against the kansas city athletics in front of a home crowd of only 2,777. the score was 8-1.