Title: 2000 World Series
Content:  team in MLB. The Mets advanced to the World Series by defeating the San Francisco Giants, three games to one, in the NL Division Series, and then the St. Louis Cardinals, four games to one, in the NL Championship Series; it was the team's fourth World Series appearance, making it the most of any expansion franchise in MLB and the Mets' first appearance since winning the 1986 World Series. The Yankees were the first team in baseball to win three consecutive championships since the 1972–1974 Oakland Athletics, and the first North American professional sports team to accomplish the feat since the 1996–1998 Chicago Bulls.
Title: 1986 World Series
Content:  Both the Mets and Red Sox would go without reaching the World Series for some time. The Red Sox would not return until 2004, where they would finally break through and win their first title since 1918. They have gone on to win three additional world championships, most recently in 2018. The Mets have returned to the World Series twice since 1986. In 2000, the first time since 1956 that two teams from the same city faced each other in the World Series, the Mets lost to the New York Yankees. The Mets returned in 2015, only to lose again to the Kansas City 
Title: 2015 World Series
Content:  The Mets made their fifth appearance in the World Series after sweeping the Cubs 4–0 in the 2015 National League Championship Series (NLCS). They had split their four previous appearances, winning the 1969 World Series against the Baltimore Orioles and the 1986 World Series against the Boston Red Sox, while losing the 1973 World Series against the Oakland Athletics and the 2000 World Series against the New York Yankees, their cross-town rivals. The Mets qualified for the postseason by winning the National League (NL) East, their sixth division title. They faced the Los Angeles Dodgers in the 2015 NL Division Series, winning in five games. In the 2015 NLCS, Daniel Murphy led the team by hitting home runs in each game of the four-game sweep of the Chicago Cubs. By winning the NLCS, the Mets ensured they have the most World Series appearances by an expansion franchise with five. In addition, the Mets have made World Series appearances in all but one of their six decades of existence, not appearing in any that were played during the 1990s. This was the first World Series appearance for Mets' manager Terry Collins.
Title: History of the New York Mets
Content:  with a come-from-behind walk-off home run by Lenny Dykstra. In Game 6, the Mets turned a 3–0 ninth-inning deficit into a sixteen-inning marathon victory to clinch the National League pennant and earn their third World Series appearance. The Astros would have to wait until 2005 to finally win their first pennant. In the World Series against the Boston Red Sox, the Mets faced elimination leading into Game 6. The Red Sox scored two runs in the 10th inning and twice came within one strike of winning their first World Series since. However, the Mets rallied and would come back in typical Amazin' Mets 
Title: History of the New York Mets
Content:  Stadium. During their history, the Mets have won two World Series titles (1969 and 1986), five National League pennants (1969, 1973, 1986, 2000, 2015), and six National League East titles (1969, 1973, 1986, 1988, 2006, 2015). The Mets also qualified for the postseason as the National League Wild Card team in 1999, 2000, and 2016. The Mets have appeared in more World Series — five — than any other expansion team in Major League Baseball history. Their two championships equal the tally of the Toronto Blue Jays, Florida Marlins and Kansas City Royals for the most titles among expansion teams. The Mets are the only expansion team to have won 
Title: List of New York Mets seasons
Content:  After six more years in which their best league finish was ninth, the Mets won the World Series in 1969, defeating the Baltimore Orioles in five games to earn what is widely considered one of the biggest upsets in baseball history. Four seasons later, the Mets returned to the World Series, where they lost to the Oakland Athletics in seven games. After winning two NL championships in five years, New York struggled for the next decade, not coming within 10 games of the NL East leader until 1984. In 1986, the team posted 108 wins, the most in franchise history, and defeated the Houston Astros in the National League Championship Series (NLCS) to advance to the 
Title: New York Mets
Content:  better than second-to-last in the 1960s until the "Miracle Mets" beat the Baltimore Orioles in the 1969 World Series, considered one of the biggest upsets in World Series history despite the Mets having won 100 games that season. The Mets have qualified for the postseason nine times, winning the World Series twice (1969 and 1986) and winning five National League pennants (most recently in 2000 and 2015). Since 2020, the Mets have been owned by billionaire hedge fund manager Steve Cohen who purchased the team for $2.4 billion. As of the end of the 2021 season, the team's overall win-loss record is 4,551–4,927 (.480).
Title: Cinderella (sports)
Content: 1969 New York Mets — The Mets won their first ever World Series title after defeating the heavily favored 109-win Baltimore Orioles in the 1969 World Series; previously, the Mets had finished either last or next-to-last in the National League every year of their existence. ; 2003 Florida Marlins — The Marlins used a strong second half to win the World Series, after defeating the San Francisco Giants in the NLDS, the Chicago Cubs in the NLCS, and the New York Yankees. The NL Championship Series was especially memorable for the Marlins' rally and another Cubs collapse, as it extended the alleged Curse of the Billy Goat. ; 2004 Boston Red Sox 
Title: 2015 New York Mets season
Content:  The 2015 season was the 54th season in the history of the New York Mets. The Mets finished the regular season with a record of 90–72, winning the National League East title on September 26, their first division title since 2006 and sixth overall. They defeated the Los Angeles Dodgers in the Division Series in five games and swept the Chicago Cubs in the National League Championship Series. They lost to the Kansas City Royals in five games in the 2015 World Series. It was the Mets' first appearance in the World Series since 2000 when they lost to the New York Yankees. It marked the team's first winning season since Citi Field opened in 2009 (and their first since 2008, their last season at Citi Field's predecessor, Shea Stadium).
Title: List of New York Mets seasons
Content:  Series. Trailing three games to two in the series, the Mets were one out from defeat in game six before coming back to win 6–5; they won game seven two days later to earn their second World Series championship. After a second-place finish in 1987, the Mets won the NL East the next year, but lost to the Los Angeles Dodgers in the NLCS. The Mets' next playoff appearances were their back-to-back wild card-winning seasons of 1999 and 2000; in the latter year, they won their fourth NL championship, but lost to the cross-town New York Yankees in the "Subway Series". The 2006 Mets earned an NL East title, before the St. Louis Cardinals defeated 

Question: when's the last time the mets won the world series?
Answer: 1986 World Series.