Question: The Players' Tribune was founded by the player who is now part owner of what other MLB team?

Context paragraphs:
Derek Jeter: Derek Sanderson Jeter ( ) (born June 26, 1974) is an American former professional baseball shortstop and the incoming CEO and part owner of the Miami Marlins.  Jeter played 20 seasons in Major League Baseball (MLB) for the New York Yankees.  A five-time World Series champion, Jeter is regarded as a central figure of the Yankees' success of the late 1990s and early 2000s for his hitting, baserunning, fielding, and leadership.  He is the Yankees' all-time career leader in hits (3,465), doubles (544), games played (2,747), stolen bases (358), times on base (4,716), plate appearances (12,602) and at bats (11,195).  His accolades include 14 All-Star selections, five Gold Glove Awards, five Silver Slugger Awards, two Hank Aaron Awards, and a Roberto Clemente Award.  Jeter was the 28th player to reach 3,000 hits and finished his career ranked sixth in MLB history in career hits and first among shortstops.  In 2017, the Yankees retired his uniform number 2.

Paul Baxter: Paul Gordon Baxter (born October 28, 1955 in Winnipeg, Manitoba) is a Canadian former ice hockey defenceman who played from 1979 to 1987, and has served as a National Hockey League (NHL) assistant coach for eleven seasons.  He was coaching the Wenatchee Wild in the NAHL before his firing in late November 2010.  He then went to the Wichita Falls Wildcats of the NAHL as head coach, general manager, and part owner in May 2011.  He left his operational positions with the Wildcats in October 2016 while remaining part owner.  The team would cease operations at the end of the season.  He and his wife currently live in Tennessee.

Posting system: The posting system (ポスティングシステム , posutingu shisutemu ) is a baseball player transfer system that operates between Japan's Nippon Professional Baseball (NPB) and the United States' Major League Baseball (MLB), or between the Korea Baseball Organization (KBO) and MLB.  Despite the drafting of the United States – Japanese Player Contract Agreement, unveiled in 1967 to regulate NPB players moving to MLB, problems began to arise in the late 1990s.  Some NPB teams lost star players without compensation, an issue highlighted when NPB stars Hideo Nomo and Alfonso Soriano left to play in MLB after using loopholes to void their existing contracts.  A further problem was that NPB players had very little negotiating power if their teams decided to deal them to MLB, as when pitcher Hideki Irabu was traded to an MLB team for which he had no desire to play.  In 1998, the Agreement was rewritten to address both problems; the result was dubbed the "posting system".

The Players' Tribune: The Players' Tribune is a new media platform that provides content written by professional athletes.  Founded by former professional Major League Baseball player Derek Jeter, "The Players' Tribune" provides daily sports conversation and publishes first-person stories directly from athletes.  Content ranges from videos to podcasts to player polls and written pieces.

Joseph M. McCormick: Joseph Medill McCormick, known as Medill McCormick (May 16, 1877 – February 25, 1925), was part of the McCormick family of businessmen and politicians in Chicago.  After working for some time and becoming part owner of the "Chicago Tribune," which his maternal grandfather had owned, he entered politics.

Duke Osborn: Robert Duke Osborn (February 1, 1897 – November 2, 1976) was an American football player.  After high school, Osborn attended Penn State University.  Osborn made his professional debut in the National Football League in 1921 with the Canton Bulldogs.  He would go to help the Bulldogs win back-to-back NFL Championships in 1922 and 1923.  During the course of his career, Osborn also played for the Cleveland Bulldogs and Pottsville Maroons.  He spent a total of 8 years in the NFL.  Osborne also became part owner of the Maroons in 1928, when team's owner, Dr. John G. Streigel, "loaned" the team to three players Wilbur "Pete" Henry, Herb Stein and Osborn.  However, after the season Streigel, who probably still had majority ownership, sold the team to a New England-based partnership that included Maroons' standout George Kenneally.

Major League Baseball Featuring Ken Griffey Jr.: Major League Baseball Featuring Ken Griffey Jr. is an arcade-style baseball video game produced by Nintendo and developed by Angel Studios for the Nintendo 64 platform.  The game is follow-up to Nintendo's previous title featuring Griffey, "Ken Griffey Jr.'s Winning Run".  It was released on May 31, 1998, and allows players to choose any contemporary Major League Baseball franchise and play through an exhibition, a complete season, or a World Series.  Players can also choose any player from any team to compete in a Home Run Derby.  The player can also select up to four individuals to play as in Home Run Derby.  The game also featured all 30 MLB team's stadiums.  The game was seen as a faster, more arcade-like baseball game compared to its rivaling product, the more realistic baseball simulation "All-Star Baseball '99".  Nintendo released a sequel the following year, called "Ken Griffey Jr.'s Slugfest".

Super Bases Loaded 3: Super Bases Loaded 3 (known in Japan as Super Moero!!  Pro Yakyuu) is a Super Nintendo Entertainment System baseball game.  It is the seventh overall installment of the "Bases Loaded" series, and the third installment of the secondary series for the Super NES.  "Super Bases Loaded 3" was licensed by the Major League Baseball Players Association (MLBPA) and uses real MLB players, but it was not licensed by Major League Baseball (MLB).  All 28 U.S. cities that had an MLB team at the time are listed but team names and logos are not given.  No real stadiums are used and the World Series is renamed the championship tournament.

Jim Crane: James Robert Crane is a businessman from Houston, Texas.  Crane is chairman and chief executive of Crane Capital Group, the majority shareholder of Champion Energy, Crane Worldwide Logistics, and Crane Freight & Shipping.  He is also the owner and chairman of the MLB team Houston Astros

Henry Medicus: Henry W. Medicus (ca. 1865 - May 13, 1941) was a wealthy furniture dealer in Brooklyn, New York in the early 1900s.  He became a part owner of the Brooklyn Dodgers baseball team in 1905 when he and Charles Ebbets bought out the shares of the team owned by Harry Von der Horst.  He remained a part owner of the ballclub until selling his shares in 1912.

Supporting paragraphs: The Players' Tribune Derek Jeter
Answer: Miami Marlins