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Post-Injury Return Timeline: Predicting When Players Come Back

You can’t predict whether a player gets hurt — but once he does, the injury type tells you a lot about when he’s back. The initial report is almost always vague (“day-to-day,” “questionable”), the fantasy market overreacts to that vagueness, and the edge goes to whoever already knows the typical timeline. These are rough ranges, not medical calls, but they’re enough to trade with.

Typical return timelines by injury

Season-ending (out for the year):

  • ACL tear — surgery + ~9–12 month rehab. Done for the season, and in dynasty, often not fully explosive until the year after he returns.
  • Achilles tear — season-ending, and the most important one for dynasty: many players lose a step for a full year afterward. Discount the following season too, not just this one.
  • Any fracture needing surgery (leg, foot Lisfranc, etc.).

Multi-week (the buy-low zone):

  • High-ankle sprain — the sneaky one. Usually 4–6 weeks, frequently lingers longer than the first report, and saps burst even after he’s “back.” Treat the return as gradual.
  • Hamstring strain — often only 1–4 weeks on paper, but the re-injury rate is very high. A hamstring that flares once tends to flare again — discount for recurrence and don’t trust a fast return.
  • MCL sprain — usually 1–4 weeks for Grade 1–2 (not season-ending, despite how it sounds); only a Grade 3 or combined knee injury means surgery.
  • Turf toe — deceptively bad. The timeline reads short but it lingers for weeks and kills the explosiveness that drives fantasy points.
  • Calf / groin / quad strains — ~2–4 weeks, and like all soft-tissue injuries, carry re-aggravation risk.

Short-term (usually one game or less): bruises and contusions, mild strains, illness.

Genuinely uncertain — wait for clarity: back injuries (unpredictable), and concussions, which are protocol-gated and can be one week or several regardless of how the player “feels.” Don’t assume a one-week absence.

Why the market misprices these

Team and beat-reporter language is intentionally cautious early: “day-to-day” often just means “we don’t know yet.” The information usually clarifies over about a week — first the diagnosis, then a practice-participation update (limited → full is the tell), then a return. The buy-low window is that gap between the scary first report and the moment everyone realizes the timeline is manageable. Move before the update, not after.

The trading decision

  • Season-ending: sell for whatever you can — any return beats a season-long zero — unless you’re a dynasty rebuilder who can stash the discount.
  • Multi-week: wait for the week-two clarification, then do the playoff math. Back before your fantasy playoffs (Weeks 15–17) and you’re weak at the position → buy the panic. Timeline that bleeds into or past the playoffs → sell.
  • Soft-tissue (hamstring/groin/calf): apply a recurrence discount even on an optimistic timeline.
  • Short-term: hold; don’t sell a stud over one missed game.
  • Uncertain (back/concussion): don’t trade on an unknown — you’re guessing, and so is everyone else.

Worked example

Week 3, your RB goes down: “high-ankle sprain, questionable.” Hold — don’t sell into the fog. The week-two update reads “out 4–6 weeks.” Now decide: if you’re contending and thin at RB, that’s back around Weeks 9–11, ahead of the playoffs — buy him at the discount and expect a slow ramp. If you’re already limping toward Weeks 15–17, a lingering high-ankle is exactly the injury to sell before it costs you a round.

Living guide — updated each preseason. Related: injury strategy · trade timing · player valuation.