Carrillo attended Mt. Carmel High School in Chicago which boasts other famous sports alums such as Donovan McNabb, Simeon Rice, Antoine Walker, Chris Chelios, and Denny McLain, where he was a two sport star in both basketball and baseball. As a junior, Carrillo decided to concentrate solely on baseball. He played both shortstop and pitcher. As a shortstop, he broke the school’s single season hit record with 52 hits his junior year to go along with a 5-1 record and a 1.12 ERA. His senior year, Carrillo posted a 9-1 record with an ERA of 0.96 while batting .370 with 5 home runs and 48 RBI which led to his selection to the All-State team.