The 2023 Prospect Handbook is your guide to the next wave of MLB stars The 2023 Prospect Handbook is your guide to the next wave of MLB stars. With complete scouting reports on more than 900 prospects, the Prospect Handbook is a must-have for superfans as well as fantasy players. Dominate your dynasty league and be the first to know about the stars of the 2020s and early 2030s.