Though Perfect Game doesn’t have a grade on him, MLB.com likes him as a top 100 player. Here’s the MLB.com scouting report on the smooth SS:
Perhaps the best player from Northern California in this Draft class, Diaz has been on the national radar for some time now, playing for USA Baseball’s national 12U team back in 2015 and the 15-and-under team in both 2017 and 2018. He had a solid showcase showing in 2020, including being named to the all-tournament team at Perfect Game’s World Wood Bat Association World Championship.