Week 21 fantasy baseball waiver targets lean toward speed, multi-position eligibility, and affordable power. Sal Frelick remains a surprise under-rostered asset, posting a .298/.361/.416 line with a pace for roughly 78 runs, 12 homers, 63 RBI, and 24 steals, while anchoring Milwaukee’s top-of-order role. Blaze Alexander has surged since Eugenio Suárez was moved, flashing 3B/2B/SS flexibility with 12.0+ barrel-rate indicators and a strong power-speed profile. Noelvi Marte sits at the heart of Cincinnati’s lineup surge, delivering 27 runs, eight homers, 36 RBI and seven steals in a pace that hints at 25+ homers and 20+ steals if given full plates. Chandler Simpson’s speed drives the category lead, with a .307 average across 287 PAs and 34 steals, making him a gold-mangled draftee in deep formats. Joey Ortiz has heated up to a .392/.436/.529 clip this month, pairing strong contact with dual 3B/SS eligibility. Nolan McLean debuts for New York, bringing a deep, six-pitch mix that offers upside in 12-team or deeper leagues. Hurston Waldrep has dazzled in Atlanta, with a sub-1.10 ERA across his late-season run and a splitter that continues to miss bats. The common thread is roster flexibility and year-end upside for managers chasing categories across AVG/OBP, power, and speed.