High-ceiling players are scarce on fantasy free-agent lists as the season winds down, so every add with even a chance to deliver elite returns in the next few weeks matters. Four MAJOR league talents stand out as must-adds already in the majors: Luke Keaschall, Edward Cabrera, Gavin Williams, Zebby Matthews. Keaschall brings a patient, middle-of-the-order approach and pace on the bases; Cabrera has sharpened his control and arsenal, lifting his fantasy ceiling; Williams has flashed big-move velocity plus a hidden sweeper that miss bats; Matthews is a sleeper with a lively slider and improving command, locked into a Twins rotation. Will Warren offers a reliable two-start week for those chasing volume. In deeper formats, Cade Cavalli and Hurston Waldrep are still on the radar for promotion and longer-term upside. Aug. 15 marks the 45-day rookies-eligible cutoff, so promotions like Basallo, Beavers, Painter and Wetherholt could reshape rosters in coming days.