After some initial confusion, Prevost was confirmed to be a White Sox fan by his brother, John. He's not a Cubs fan. In fact, Prevost is such a big White Sox fan that he was at Game 1 of the 2005 World Series at what is now known as Rate Field. Prevost made an appearance in the stands during a ninth-inning crowd shot:

Following his election as the first American Pope, Leo XIV's love for US sports gained attention after viral footage showed him at the 2005 World Series cheering for the Chicago White Sox. He’s also a fan of the NBA’s “Nova Knicks,

The Fox Sports camera could have panned to any fan during the ninth inning of Game 1 of the 2005 World Series; it randomly landed on the future Pope Leo XIV.