Sanchez attended North Shore Senior High School in Houston, Texas. As a junior in 2023, he notched 32 tackles, 11 pass deflections, five interceptions, and one defensive touchdown,[2] and was named a first-team Junior All-American by MaxPreps.[3] Coming out of high school, Sanchez was rated as a five-star recruit, the second-overall cornerback, and the sixth overall player in the class of 2025.[4] He committed to play college football for the Ohio State Buckeyes over offers from schools such as Alabama, Texas A&M, LSU, Oklahoma, Texas and USC.[4]