Greg Maddux vs Roger Clemens, April 28, 2005
Don Sutton vs. Steve Carlton, August 4, 1987.
Don Sutton vs. Phil Niekro, June 8, 1987.
Don Sutton vs. Tom Seaver, July 27, 1986.
Tim Keefe vs. Jim “Pud” Galvin, July 21, 1892.
Keefe and Galvin faced each other four times as 300-game winners, oddly enough all in July (the game listed above, and on the Fourth in 1892, the 9th in 1891, and on July 17, 1890).
Source- http://www.hardballtimes.com/faceoff-300/
2/20/2016 11:20 AM (edited)