Trading History with Washington Nationals/Montreal Expos
- May 24, 2010: The Washington Nationals sent Andrew Brown to the St. Louis Cardinals as part of a conditional deal.
- May 7, 2004: The St. Louis Cardinals traded Joe Horgan to the Montreal Expos for Benji DeQuin (minors).
- June 26, 2003: The St. Louis Cardinals traded Kevin Joseph to the Montreal Expos for Pat Collins (minors).
- May 1, 2003: The Montreal Expos sent Mario Encarnacion to the St. Louis Cardinals as part of a conditional deal.
- December 14, 2000: The St. Louis Cardinals traded Britt Reames and Fernando Tatis to the Montreal Expos for Dustin Hermanson and Steve Kline.
- April 5, 1995: The Montreal Expos traded Ken Hill to the St. Louis Cardinals for Kirk Bullinger, Bryan Eversgerd and DaRond Stovall.
- November 25, 1991: The St. Louis Cardinals traded Ken Hill to the Montreal Expos for Andres Galarraga.
- April 23, 1990: The Montreal Expos traded Rex Hudler to the St. Louis Cardinals for John Costello.
- February 11, 1988: The St. Louis Cardinals traded Marty Pevey to the Montreal Expos for Bob Sudo (minors).
- March 31, 1986: The St. Louis Cardinals traded Tom Nieto to the Montreal Expos for Fred Manrique.
- February 27, 1986: The Montreal Expos purchased Randy Hunt from the St. Louis Cardinals.
- February 10, 1986: The St. Louis Cardinals purchased Greg Bargar from the Montreal Expos.
- February 6, 1985: The St. Louis Cardinals traded Mickey Mahler to the Montreal Expos for a player to be named later. The Montreal Expos sent Tom Lawless (March 25, 1985) to the St. Louis Cardinals to complete the trade.
- July 1, 1984: The Montreal Expos traded Chris Speier and cash to the St. Louis Cardinals for Mike Ramsey.
- July 21, 1978: The St. Louis Cardinals purchased Wayne Garrett from the Montreal Expos.
- November 6, 1976: The Montreal Expos traded Steve Dunning, Pat Scanlon and Tony Scott to the St. Louis Cardinalsfor Bill Greif, Sam Mejias and Angel Torres.
- July 25, 1975: The Montreal Expos traded Larry Lintz to the St. Louis Cardinals for Jim Dwyer.
- February 14, 1975: The St. Louis Cardinals traded Stan Papi to the Montreal Expos for Craig Caskey.
- December 6, 1974: The Montreal Expos traded Ron Fairly to the St. Louis Cardinals for Rudy Kinard (minors) and Ed Kurpiel (minors).
- November 6, 1972: The Montreal Expos traded Tim McCarver to the St. Louis Cardinals for Jorge Roque.
- June 15, 1971: The Montreal Expos traded Bob Reynolds to the St. Louis Cardinals for Mike Torrez.
- May 19, 1970: The St. Louis Cardinals purchased Don Shaw from the Montreal Expos.
- May 15, 1970: The Montreal Expos purchased Rich Nye from the St. Louis Cardinals.
- May 5, 1970: The St. Louis Cardinals traded Bill Dillman to the Montreal Expos for Carroll Sembera. (Date given is approximate. Exact date is uncertain.)
- June 3, 1969: The Montreal Expos traded Mudcat Grant to the St. Louis Cardinals for Gary Waslewski.
