Quite a few players (mostly outfield) have worn 23 while on the Mets. Here's the list and years they wore it:
Outfielders- Joe Christopher (62-65), Billy Murphy (66), Leroy Stanton (70-71), Jesus Alou (75), Leon Brown (76), Bernard Gilkey (96-98*), Jermaine Allensworth (98*), Matt Lawton (01^), McKay Christensen (02**), Esix Snead (02**), Marlon Anderson (07^^), Chris Carter (10), Mike Baxter (11*^)
Infielders- Bob Heise (68-69), Ted Martinez (74), Doug Flynn (77-81), Brian Giles (82-83), Chris Donnels (91-92), Tim Bogar (93-95), Jason Phillips (03-04), Julio Franco (06-07^^)
Catcher Brian Schneider (08-09)
Pitchers- Pat Mahomes (99-00), Brain Rose (01^), Kazuhisa Ishii (05), Blaine Boyer (11*^)
Coaches Bud Harrelson (85-88)
*In 1998 Gilkey wore 23 until July and it was handed over to Allensworth in August
^In 2001 Rose wore 23 for 21 days in April and gave it over to Lawton in July
**In 2002 Christensen had 23 for a week in April and Snead had it for 27 days in September
^^In 2007 Franco had 23 until July when he handed it off to Anderson
*^In 2011 Boyer wore 23 for 9 days in April, Baxter took it in August
Jack Aker, Ray Webster, Steve Hovley, Tim Hosley, Gaylen Pitts, Nate Colbert, Rico Carty, Willie Horton, Craig Minetto, Derek Bryant, Ed Figueroa, Chris Codiroli, Chris Bando, Dann Howitt, Jeff Russell, Mike Aldrete, Phil Plantier, Patrick Lennon, A. J. Hinch, Mario Valdez, David Justice, Bobby Kielty
The first baseball team to use numbers on uniforms was the 1916 Cleveland Indians when they wore small numbers on the sleeves of their uniforms, as a way of identifying the players. This practice was short lived.
in 1929 the New York Yankees decided to wear numbers to the backs of their jerseys. The numbers corresponded to each player's general position in the lineup.for example Babe Ruth wore No. 3, since he usually batted third, and Lou Gehrig wore No. 4 as he batted fourth.
There is a long list of Cicago Cub players that wore the number 23. It ennded when Ryne Sandberg put on uniform number 23. The Cubdsrtired number 23 in honr of Ryne Sandberg. Here is a list of Cubs players that wore uniform number 23 followed by the (year worn).
Leroy Herrmann (1932)
Lynn Nelson (1934-35)
Roy Joiner (1935)
Clyde Shoun (1935-36)
Phil Cavarretta (1937-38)
Vern Olsen (1939-42)
Roy Hughes (1944-45)
Vern Olsen (1946)
Doyle Lade (1947-50)
Andy Varga (1951)
Dave Cole (1954)
Bubba Church (1954-55)
Jerry Kindall (1956-58)
Jim Brosnan (1958)
John Buzhardt (1958)
Moe Thacker (1958)
Art Schult (1960)
Nelson Matthews (1961-62)
Bobby Gene Smith (1962)
Don Young (1965)
Carl Warwick (1966)
Ron Campbell (1966)
Jimmie Hall (1969-70)
Manny Jimenez (1969)
Adrian Garrett (1970)
Ramon Webster (1971)
Carmen Fanzone (1971-74)
Pete LaCock (1975-76)
Mike Gordon (1977-78)
Jim Tracy (1980-81)
Ryne Sandberg (1982-94,1996-97) retired
Manny Trillo, one of my favorite Cubs, wore it both times he played for them.
Lou Brock wore uniform number 24 with the Chicago Cubs from 1961-1964, and number 20 with the St Louis Cardinals from 1964 - 1979.
Maddux wore No. 31 for the Chicago Cubs from 1986 to 1992, and again in 2006. He also wore 31 as a member of the Atlanta Braves from 1993 to 2003. Maddux wore No. 36 for the Los Angeles Dodgers in 2006 and 2008, and No. 30 for the San Diego Padres in 2007 and 2008.
In MLB ... 1) Pitcher Bill Lee wore #11 for the Chicago Cubs from 1937-1942. 2) Infielder Lee Bales wore #11 for the Atlanta Braves in 1966. 3) Pitcher Lee Howard wore #11 for the Pittsburgh Pirates in 1946. 4) Outfielder Lee Mazzilli wore #11 for the Pittsburgh Pirates in 1983 and 1984. 5) First baseman/outfielder Lee Stephens wore #11 for the Texas Rangers from 1996-1998.
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Manny Trillo, one of my favorite Cubs, wore it both times he played for them.
Mark Grace wore the numbers 28, and 17 during his rookie season with the Chicago Cubs in 1988, and wore the number 17 the rest of his career.
No player has ever worn number 70 for Chicago.
Young, an outfielder who played two seasons for the Chicago Cubs, wore No. 23 in 1965 and No. 29 in 1969.
George Lucas was the only one.
Jeff wore the number 20 in homage to his father who also wore that number for the '63 Yankees. Once he was traded to the Chicago Cubs, he was reassigned the number 11
Miller played with the Cubs in the 2003 season. He wore #27.
lee smith pitcher for the Chicago cubs
Rafael Palmeiro wore number 25 while with the Cubs.
Lou Brock wore uniform number 24 with the Chicago Cubs from 1961-1964, and number 20 with the St Louis Cardinals from 1964 - 1979.
billy Williams Hall of famer from the Chicago Cubs
From 1976 - 1986 playing for the Montreal Expos Andre Dawson wore uniform number 10. From 1987 - 1992 playing for the Chicago Cubs he wore number 8. 1993, and 1994 he wore number 8 for the Boston Red Sox, and back to number 8 his final two seasons with the Florida Marlins 1995, and1996.