May 29, 2021; Chicago, Illinois, USA; James Keller, 7, of Schaumberg, Illinois, does high knees with Chicago Cubs catcher Willson Contreras (40) during warmups before the game against the Cincinnati Reds at Wrigley Field. James Keller was watching warmups from the stands when Willson Contreras brought him onto the field.; Mandatory Credit: Jon Durr