Pitchers Kevin Foster of the Chicago Cubs and Marvin Freeman of the Colorado Rockies each hit home runs off each other in a 7 – 6 Chicago victory at Coors Field. Foster and Freeman became just the tenth duo in the 20th century to hit and throw homers against each other.

On May 23, 1995 — Pitchers Kevin Foster of the Chicago Cubs and Marvin Freeman of the Colorado Rockies each hit home runs off each other in a 7 – 6 Chicago victory at Coors Field. Foster and Freeman became just the tenth duo in the 20th century to hit and throw homers against each other.

Source:
Baseball Reference May 23