The 1st Quaker City Music Festival, a three-day jazz festival produced by George Wein, was held at Connie Mack Stadium in 1960.
From the August 29, 1960 edition of the Philadelphia Evening Bulletin:
The stage was situated at third base with the fans sitting in both the upper and lower stands from home plate to left field.
The lineup included Gloria Lynne, Dizzy Gillespie, Chico Hamilton, Herbert Mann, Nat Adderley, Ornette Coleman, Art Blakey, and Lee Morgan.
Connie Mack Stadium was demolished on July 13, 1976.