In the 25th iteration of the 2021 Willie McCovey Memorial Community Prospect List, the San Francisco Giants fourth and final Rule 5 protection made the rankings. Right-handed pitcher Kervin Castro, who will turn 22 on Super Bowl Sunday, was named the No. 25 prospect in the Giants farm, joining fellow Rule 5 protections Alexander Canario (No. 7), Gregory Santos (No. 15), and Camilo Doval (No. 16).