He appeared in two games in Major League Baseball , one week apart , in 1979 for the Chicago White Sox .
Mark Gerald Esser ( born April 1 , 1956 ) is a former professional baseball pitcher .
Mark Gerald Esser appeared in two games in Major League Baseball , one week apart , in 1979 for the Chicago White Sox .
Mark Gerald Esser ( born April 1 , 1956 ) is a former professional baseball pitcher .