Home Runs by Pitchers Off Each Other in the Same Game In Chronological Order
Pitcher	Team / Roster	Pitcher	Team / Roster	Date / Box
Frank Mountain	Worcester	Jim McCormick	Cleveland	08-19-1882
Pud Galvin	Pittsburgh	John Clarkson	Chicago	05-07-1887
Stump Wiedman	Detroit	Jimmy Ryan	Chicago	05-13-1887
John Healy	Indianapolis	Mark Baldwin	Chicago	06-13-1887
Pete Conway	Detroit	John Clarkson	Chicago	07-26-1887
Pink Hawley	St. Louis	Ben Sanders	Louisville	10-12-1892
Tom Parrott	Cincinnati	Bill Hutchison	Chicago	04-20-1894
Case Patten	Washington	Clark Griffith	Chicago	08-20-1901
Milt Gaston	St. Louis	Ted Blankenship	Chicago	04-18-1927
Cliff Chambers	Pittsburgh	Ralph Branca	Brooklyn	06-08-1950
Don Larsen	New York	Dick Brodowski	Boston	08-16-1955
Pedro Ramos	Minnesota	Eli Grba	Los Angeles	05-12-1961
Buster Narum	Washington	Earl Wilson	Boston	04-14-1965
Ray Sadecki	San Francisco	Tony Cloninger	Atlanta	07-03-1966
Kevin Gross	Montreal	Fernando Valenzuela	Los Angeles	05-14-1990
Marvin Freeman	Colorado	Kevin Foster	Chicago	05-23-1995
Denny Stark	Colorado	Kevin Millwood	Atlanta	05-18-2002
Pitcher	Team / Roster	Pitcher	Team / Roster	Date / Box
HR by Pitchers Off Each Other in the Same Game

 

	When John Clarkson joined the "club" in May 1887 he became the first of many from Chicago to do so. Two months later he became the first and only pitcher in history to do it twice in a season and remains the only pitcher to do it twice over the course of a Major League career. Did you know that the July 3, 1966 game is actually quite legendary as the home run hit by Cloninger versus Sadecki was a grand slam in the fourth inning AND Tony had already hit a grand slam during the first inning versus Bob Priddy? The 1887 Chicago White Stockings only had four full time pitchers on their roster and Jimmy Ryan, who apears above on 05-13-1887, was not one of them — he was a starting outfielder who had one-hundred twenty games in the field in 1887, three more at second, and eight on the mound.