- New York Mets selected Gus Bell in free agent draft on October 10, 1961.
- New York Mets selected Elio Chacon in free agent draft on October 10, 1961.
- New York Mets selected Jay Hook in free agent draft on October 10, 1961.
- New York Mets selected Sherman Jones in free agent draft on October 10, 1961.
- New York Mets traded Don Zimmer to the Cincinnati Reds for Bob Miller and Cliff Cook on May 6, 1962.
- New York Mets traded Charlie Neal and Sammy Taylor to the Cincinnati Reds for Jesse Gonder on July 1, 1963.
- New York Mets purchased Bobby Klaus from the Cincinnati Reds on July 19, 1964.
- New York Mets purchased Gerry Arrigo from the Cincinnati Reds on May 20, 1966.
- New York Mets sold Gerry Arrigo to the Cincinnati Reds on August 16, 1966.
- New York Mets traded Bob Johnson to the Cincinnati Reds for Art Shamsky on November 8, 1967.
- New York Mets sold Al Jackson to the Cincinnati Reds on June 13, 1969.
- New York Mets traded Mac Scarce to the Cincinnati Reds for Tom Hall on April 15, 1975.
- New York Mets traded Tom Seaver to the Cincinnati Reds for Doug Flynn, Steve Henderson, Pat Zachry and Dan Norman on June 15, 1977.
- New York Mets traded Ken Henderson to the Cincinnati Reds for Dale Murray on May 19, 1978.
- New York Mets traded Alex Trevino, Greg Harris and Jim Kern to the Cincinnati Reds for George Foster on February 10, 1982.
- New York Mets traded Charlie Puleo, Lloyd McClendon and Jason Felice to the Cincinnati Reds for Tom Seaver on December 16, 1982.
- New York Mets traded Jay Tibbs, Eddie Williams and Matt Bullinger to the Cincinnati Reds for Bruce Berenyi on June 15, 1984.
- New York Mets traded Randy Myers and Kip Gross to the Cincinnati Reds for John Franco and Don Brown on December 6, 1989.
- Cincinnati Reds claimed Alex Trevino of the New York Mets on waivers on September 7, 1990.
- Cincinnati Reds signed Dave Liddell of the New York Mets as a free agent on November 6, 1990.
- Cincinnati Reds signed Junior Noboa of the New York Mets as a free agent on November 16, 1992.
- New York Mets claimed Jeff Kaiser on waivers from the Cincinnati Reds on April 23, 1993.
- Cincinnati Reds claimed Pete Schourek of the New York Mets on waivers on April 7, 1994.
- Cincinnati Reds signed Pete Smith of the New York Mets as a free agent on December 1, 1994.
- New York Mets traded Mike Remlinger to the Cincinnati Reds for Cobi Cradle on May 11, 1995.
- Cincinnati Reds claimed Pedro Martinez of the New York Mets on waivers on September 13, 1996.
- Cincinnati Reds signed Ricardo Jordan of the New York Mets as a free agent on November 27, 1997.
- New York Mets traded Roberto Petagine to the Cincinnati Reds for Yuri Sanchez on February 5, 1998.
- New York Mets traded John Hudek to the Cincinnati Reds for Lenny Harris on July 3, 1998.
- New York Mets traded Ralph Milliard to the Cincinnati Reds for Mark Corey on February 4, 1999.
- New York Mets traded Shawn Estes to the Cincinnati Reds for Raul Gonzalez, Pedro Feliciano, Brady Clark and Elvin Andujar on August 15, 2002.
- New York Mets selected Eric Valent in free agent draft on December 15, 2003.
- New York Mets traded Robert Manuel to the Cincinnati Reds for David Williams on May 25, 2006.
- New York Mets signed free agent Scott Schoeneweis of the Cincinnati Reds on January 16, 2007.
- New York Mets traded Sean Henry and Jose Castro to the Cincinnati Reds for Jeff Conine on August 20, 2007.
- New York Mets claimed Andy Phillips on waivers from the Cincinnati Reds on June 25, 2008.
- Cincinnati Reds claimed Andy Phillips of the New York Mets on waivers on July 3, 2008.
- Cincinnati Reds signed Willie Harris of the New York Mets as a free agent on January 24, 2012.
- Cincinnati Reds signed Josh Satin of the New York Mets as a free agent on November 20, 2014.
- New York Mets traded Dilson Herrera and Max Wotell to the Cincinnati Reds for Jay Bruce on August 1, 2016.
- New York Mets traded Matt Harvey to the Cincinnati Reds for Devin Mesoraco on May 8, 2018.
- New York Mets claimed Heath Hembree on waivers from the Cincinnati Reds on August 20, 2021.
- Cincinnati Reds signed Albert Almora of the New York Mets as a free agent on March 20, 2022.
- Cincinnati Reds signed Brandon Drury of the New York Mets as a free agent on March 21, 2022.
- New York Mets traded Jose Acuna and Hector Rodriguez to the Cincinnati Reds for Tyler Naquin and Phillip Diehl on July 28, 2022.
|