Since Robert Prevost is a Chicago native, baseball fans were eager to learn which baseball team the new pontiff supports.

The Chicago-born Pope Leo XIV, formerly Cardinal Robert Prevost, supports one baseball team in the Windy City.

The debate over Pope Leo XIV's favorite baseball team has swept Chicago into a fierce debate over the Cubs and Sox

"He's Sox, and then the radio announced Cubs, and that's not true," the pope's older brother, John Prevost, told CBS News Chicago.

Pope Leo XIV was born on Chicago's South Side and grew up in the south suburban area. However, mixed reports have Chicagoans wondering who does he root for? His brother John Prevost told ABC News' Alex Perex that Pope Leo is a White Sox fan.

Robert Francis Prevost became the first American-born pope on Thursday. While his professional sports allegiances aren't clear, the Villanova grad was embraced by his alma mater.

The Cubs and White Sox paid tribute to recently elected Pope (and Chicago native) Leo XIV amid a fandom debate.

Is Pope Leo XIV a Chicago White Sox or Chicago Cubs fan? - The brother Robert Francis Prevost, who was chosen on Thursday as the first American pope, has revealed where his baseball allegiances lie

The pontiff had lived in the house full-time until going off to a Michigan seminary for high school in 1969 and following that, to college at Villanova University in 1973.