The 2015 Kansas City Royals season was the 47th for the franchise, and their 43rd at Kauffman Stadium. The Royals made their second consecutive World Series appearance in 2015, after winning the American League in 2014. They won the series for the first time since 1985. The team won their first AL Central title on September 24, 2015, the first time the Royals won their division since 1985. They opened the playoffs by defeating the Houston Astros in five games in the Division Series and then defeated the Toronto Blue Jays in six games in the American League Championship Series. They defeated the New York Mets in five games in the 2015 World Series, the second World Series championship in franchise history. The 2015 Royals were the first team since the 1989 Oakland Athletics to win the World Series after having lost the series in the previous season.
Offseason
October 30: Josh Willingham, James Shields, Raúl Ibañez, Luke Hochevar, Jason Frasor, Scott Downs, and Norichika Aoki become free agents. Hochevar and Frasor re-signed with the Royals. Downs signed with the Cleveland Indians. Aoki signed with the San Francisco Giants. Shields signed with the San Diego Padres. Willingham retired at age 34. Ibañez retired at age 42.
November 1: Billy Butler becomes a free agent. He would sign with the Oakland Athletics.
November 3: Promoted Paulo Orlando.
Week of November 5: Signed 4 players to a minor league contract, and invited 2 of them to spring training.
November 20: Received Reymond Fuentes from the San Diego Padres for Kyle Bartsch and promoted 2 other players.
November 24: Jayson Nix becomes a free agent while Juan Flores signs a minor league contract.
November 26: Received Ryan Jackson from the Los Angeles Dodgers for cash. Jackson would be sent to the minors.
November 28: Received Bryan Flynn and Reid Redman from the Miami Marlins for Aaron Crow. Signed Jason Frasor and also gave Ismaldo Rodriguez to a minor league contract.
December 2: Francisley Bueno becomes a free agent as Dany Geraldo signs a minor league contract.
December 8: Signed Gabriel Noriega to a minor league contract and invited him to spring training.
December 11: Received Jandel Gustave from the Boston Red Sox for cash.
December 14: Signed Angel Franco to a minor league contract.
Week of December 15: Signed 3 players to a minor league contract. Sent 3 players to the minors. Released Carlos Peguero. Signed Kendrys Morales, Alex Ríos, Kris Medlen, and Yohan Pino. Received Brian Broderick from the Los Angeles Angels for Johnny Giavotella.
December 28: Signed 3 players to a minor league contract.
December 29: Signed Edinson Vólquez.
January 4: Signed Ryan Madson to a minor league contract and invited him to spring training.
January 16: Signed 2 players to a minor league contract and invited them to spring training.
January 26: Invited 16 players to spring training and signed J. C. Boscán to a minor league contract and also invited him to spring training. Brian Bocock also signs a minor league contract.