The Red Sox have four players on Keith Law's (The Athletic) Top 100 Prospects list.
Tristin Casas is already in Boston. He put up a solid 113 OPS+ (as did Giancarlo Stanton) in 95 plate appearances last season (.197/.358/.408). Sox Prospects currently estimates Ceddanne Rafaela could arrive in Boston late in 2023, with Marcelo Mayer in late 2024, and Miguel Bleis in 2026.
Mayer had a tough full-season debut in 2022, as he missed a month with a sprained wrist in the first half and struggled to drive the ball for four or five weeks after he returned, and then fought through some back tightness in July that may also have hurt his power.