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

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.

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.

Almost immediately after Chicago-born Cardinal Robert Prevost’s election as Pope, the question emerged: is the pontiff a fan of the Cubs or the White Sox?

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.

Chicago-born Cardinal Robert Prevost was named Thursday as the first ever American pope – and folks in the Windy City are having a blast over it. “From now on, all communion wafers shall be deep dish ,” one commenter quipped on X. Chicago sports fans wasted no time jumping on the bandwagon.

Robert Prevost has been announced as the new Pope - taking the name Pope Leo XIV - and is the first American pontiff to be elected as the leader of the Catholic Church