When the Yankees and Mets completed a trade on Tuesday that sent L.J. Mazzilli to the Bronx and Kendall Coleman to Queens, it marked just the 15th time in Major League Baseball history the crosstown rivals have collaborated on a deal.
The two clubs are often jockeying for the title of New York's best team, but ever so often they partner on a swap with the hope of improving their respective organizations.
The trades between the Yanks and Mets have not always resulted in direct changes to their big league clubs -- at least at the onset of the deal -- as we saw with Mazzilli and Coleman, both Minor Leaguers. However, there have been a number of impactful moves the two sides have worked on together.
Here is a history of trades between the Yankees and Mets:
April 10, 2018: Yankees trade Coleman to Mets for Mazzilli
Mazzilli, son of former big leaguer Lee Mazzilli, hit .254/.340/.362 with five homers and 40 RBIs in 110 games in the Mets' Minor League system in 2017 before being shipped across the city. The 27-year-old utility man was 2-for-6 to start '18.
The 22-year-old Coleman was an 11th-round selection by the Yankees in 2013. He is a career .207/.309/.301 hitter over 231 games in the Minors.
Dec. 19, 2014: Yankees purchase Gonzalez Germen from Mets
German went 1-2 with a 4.31 ERA in 64 2/3 innings across two seasons for the Mets before the Yanks purchased him. He never appeared in a Major League game for the Bombers, and was purchased by the Rangers on Jan. 20, 2015.
Dec. 3, 2004: Mets trade Mike Stanton to Yankees for Felix Heredia
Stanton, a left-handed pitcher, wore pinstripes for six seasons from 1997-2002. He won three World Series championships with the Yankees and was selected to the American League All-Star team in 2001. Following the trade to the Mets, the southpaw went 4-13 with a 3.68 ERA in 122 1/3 frames -- all in relief.
Heredia was near the end of his career when the deal was completed, and after recording a 6.28 ERA in 47 games for the Yanks in 2004 threw 2 2/3 scoreless frames for the Mets in '05. He became a free agent at the end of that season, but never returned to the Majors.
July 16, 2003: Yankees trade Ryan Bicondoa, Jason Anderson and Anderson Garcia to Mets for Armando Benitez
Benitez was the big haul for the Yankees in this midseason deal, though the club then flipped him to the Mariners for right-hander Jeff Nelson less than three weeks later. After going 18-14 with a 2.70 ERA in 347 innings for the Mets, Benitez allowed four runs (two earned) in 9 1/3 frames with the Yanks.
Bicondoa never reached the Majors, Anderson allowed six runs in 10 2/3 innings with the Mets following the deal and Garcia spent a few years in the club's Minor League system before playing one game in the Majors for the Phillies in 2007.
Dec. 7, 2001: Yankees trade David Justice to Mets for Robin Ventura
Perhaps the most notable swap between the two clubs, this deal sent Justice, who hit .268/.357/.495 with 38 homers and 111 RBIs in 189 games in pinstripes, to the Mets. The 1990 National League Rookie of the Year Award winner lasted a week in Queens before the Mets flipped him to the A's for Mark Guthrie and Tyler Yates.
Ventura turned out to be a good get for the Bombers, as he batted .247/.368/.458 with 27 homers and 93 RBIs while being named to the AL All-Star team in 2002. He struggled a bit in '03, and he was sent to the Dodgers at the non-waiver Trade Deadline for Bubba Crosby and Scott Proctor.
Sept. 17, 1993: Yankees trade Kenny Greer to Mets for Frank Tanana
Greer was a solid Minor Leaguer, recording a 3.97 ERA in 786 innings there throughout his professional career. His lone MLB victory came with the Mets in 1993 -- less than two weeks after being traded from the Yanks -- as he pitched a scoreless 17th inning on Sept. 29 vs. the Cardinals. He only appeared in eight big league games after that.
Tanner went 7-15 with a 4.48 ERA in 183 innings for the Mets in 1993 prior to switching sides. He went 0-2 with a 3.20 ERA in 19 2/3 frames with the Yankees before retiring from baseball.
June 9, 1992: Mets trade Tim Burke to Yankees for Lee Guetterman
Burke pitched to a 2.75 ERA in 55 2/3 innings with the Mets in 1991 before struggling to the tune of a 5.74 ERA in 15 2/3 frames in '92. The change of scenery was a boon for the right-handed hurler, as he recorded a 3.25 ERA in 27 2/3 innings with the Yankees in his final MLB season.
Guetterman went 21-19 with 3.73 ERA in 347 1/3 innings over five seasons in pinstripes. Following the trade, he didn't have quite the same success, going 3-4 with a 5.82 ERA in 43 1/3 frames for the Mets before leaving for free agency after the 1992 season.
July 10, 1989: Mets trade Marcus Lawton to Yankees for Scott Nielsen
A sixth-round Draft choice by the Mets in 1983, Lawton did not appear in a Major League game until after he was dealt to the Yankees. The outfielder's big league career lasted all of 10 games, as he recorded three hits in 14 at-bats in 1989. He scored a run and stole a base before season's end.
Nielsen went 6-6 with a 4.83 ERA in 76 1/3 innings during his tenure with the Yankees, but he never reached the Majors with the Mets. He was granted free agency after the 1989 season, but he was unable to latch on with another team.
Dec. 11, 1987: Yankees trade Steve Frey, Phil Lombardi and Darren Reed to Mets for Victor Garcia and Rafael Santana
Santana, a shortstop who batted .248/.296/.310 with 62 doubles and 113 RBIs in 483 games in four years in Queens, helped the Mets win the 1986 World Series. He played in 148 games for the Yankees in '88 after the offseason deal, hitting .240/.289/.294 with 115 hits and 38 RBIs. Garcia, a lefty hurler, was a career Minor Leaguer.
Lombardi hit .250/.327/.455 with two homers and six RBIs in 25 games with the Yankees from 1986-87 and then batted .229/.302/.313 with one homer and three RBIs in 18 games for the Mets following the deal. Reed hit a homer and drove in two runs in 26 games for the Mets in 1990, and Frey ended up pitching eight years in the Majors, but none for the Yankees or Mets.
April 18, 1983: Yankees trade Tucker Ashford to Mets for a player to be named later and Steve Ray. Mets sent Felix Perdomo to Yankees to complete the trade
Ashford appeared as a defensive replacement in three games for the Yankees in 1981, but that was the only Major League action he saw before departing for the Mets, for whom he recorded 10 hits, including a triple, in 35 games. Neither Ray nor Perdomo ever reached the Majors.
April 1, 1980: Yankees purchase Marshall Brant from Mets
Brant appeared in three games with the Yankees but did not record a hit in six at-bats. He was released by the club after the 1980 season and then brought back as a free agent a few months later. He played five more games in the Majors for the A's in '83.
Dec. 9, 1977: Yankees trade Sergio Ferrer to Mets for Roy Staiger
Ferrer tallied seven hits, including a triple, in 40 at-bats following his trade to the Mets. Staiger, a third baseman who was drafted in the first round by the Mets in 1970, hit .226/.273/.298 with four homers and 37 RBIs in parts of three seasons with the club. He tallied three hits in 11 at-bats during a four-game stint with the Yankees in '79.
July, 1972: As part of a 3-team trade, Yankees send Tommie Sheppard to Montreal Expos. Expos send Dave McDonald to Mets
Sheppard, a 17th-round pick in 1970 by the Mets, never reached the Majors, though he recorded a 3.75 ERA over four Minor League seasons. McDonald had five hits, including a double, in 23 at-bats over nine games for the Yankees in 1969, but he didn't reached the big leagues with the Mets after the trade.
June 28, 1967: Mets purchase Hal Reniff from Yankees
The Yankees signed Reniff as a free agent before the 1956 season, and he went on to have a successful career in the Bronx. The right-hander pitched to a 3.26 ERA in 428 1/3 relief innings across seven seasons. He fared well with the Mets, too, going 3-3 with a 3.35 ERA in 43 innings in the second half of the '67 season.
June 15, 1966: Mets purchase Bob Friend from Yankees
Friend spent a majority of his career with the Pirates -- including the club that beat the Bombers in the 1960 World Series -- before being traded to the Yankees in '65 for Pete Mikkelsen and cash. The right-hander went 1-4 with a 4.84 ERA in 12 games (eight starts) for the Yanks before going 5-8 with a 4.40 ERA in 22 games (12 starts) for the Mets to finish out the '66 season. He called it a career soon after.
Oliver Macklin is a reporter for MLB.com based in Washington, D.C. Follow him on Twitter at @basebollie.