Casas was Boston’s first-rounder in 2018 out of a Florida high school and spent 2019 in Low A, where he hit .256/.350/.480 at age 19, good for fifth in all of Low A in slugging percentage. Casas has a solid swing where he can get to real power when he rotates his hips, but he can get locked up on pitches up the zone. He has a real two-strike approach, similar to Juan Soto’s, where he widens his stance substantially and chokes up on the bat to go for contact, which also reduces his power. He has a very good eye for his age, and his approach gets him into a lot of counts where he can hit for power, giving reason to think he’ll get to 30-plus homers in time. He started the season by trying to hit from an extreme crouch, resulting in a .208/.284/.364 line in April, but went on a tear after reverting to his usual stance, showing the power and patience required to profile as at least an above-average regular at first base.