Perryville's Merritt "Mickey" McMullen began his softball career in 1954, playing fast pitch before enlisting in the
In 1962, he began playing slow pitch, for the Fisherman's Inn and White Horse Hotel. He was known as a slick fielding shortstop and a line drive hitter with occasional power. He joined AA&W in 1964 and played in the Unlimited League at the Marylander in Aberdeen. In 1970, AA&W won the ASA State Tournament; McMullen was the tournament MVP. In the championship game of the ASA Regionals he hit a two-out, 7th inning home run off Fulford TV's Byron Ziegler to tie the game and force extra innings.
In 1968, McMullen was named to the Civilian Welfare Council at