Week 21 in fantasy baseball centers on savvy IL stashes with upside for the stretch drive. Ryan Yarbrough returns to a Yankees rotation eager for stability after an oblique ailment, offering speculative late-season value if rehab goes clean. Landen Roupp looks poised to rejoin the Giants with strong strikeout metrics and favorable home/road splits, potentially anchoring a depth start. Colton Cowser carries power upside and outfield flexibility, but concussion issues keep him risky until late August. Jacob Wilson remains a hot target for AVG/OBP and run production as he nears activation from forearm surgery. Hyeseong Kim, a versatile Dodger with speed and middle-infield eligibility, may reclaim regular at-bats once back. Across the board, managers should consider brief IL stashes to boost stacks when playoff rosters tighten.

These five players each bring a different path to value: Roupp’s strikeout ability and pitcher-friendly home park; Yarbrough’s proven 2025 form with caveats on injury recovery; Cowser’s past power in a strong Orioles lineup; Wilson’s top-line batting average and OBP splash; Kim’s speed and multi-position eligibility in a potent Dodgers lineup. Owners in redraft leagues with IL slots will want to monitor rehab updates and activation timelines, ready to pounce as Week 21 turns into Week 22 and the playoff push accelerates.