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Will Nick Bosa be healthy enough for week one against the Rams?

Nick Bosa's health status ahead of Week 1 against the Rams is uncertain due to a right knee tendonitis diagnosis.

First seen Aug 13, 2026 · 11:16 PM UTC

Fantasy Implication reviewed impact -1.0

Nick Bosa is a defensive lineman, so this news has zero relevance in standard/PPR leagues but matters significantly in IDP (Individual Defensive Player) formats, where he's typically a top-5 DL target. Knee tendonitis is a chronic, often lingering issue rather than an acute injury — it can flare up during a season and limit explosiveness/pass-rush snaps even if he technically suits up. If Bosa is limited or inactive Week 1, it also modestly dings the 49ers' team DST in IDP/standard defense scoring, since he's their primary pass-rush and sack producer; a diminished pass rush could reduce sacks/pressures and give Matthew Stafford more time against a compromised front.

IDP leagues: bench Bosa or have a direct backup (Yetur Gross-Matos/Robert Beal) ready as a speculative add Standard leagues: no action needed, Bosa is not fantasy-relevant Consider fading 49ers DST slightly in Week 1 given uncertainty around their top pass rusher Monitor practice reports Wed-Fri for designation (questionable/doubtful) before locking IDP lineups

Niners’ coach Kyle Shanahan reveals Bosa has right knee tendonitis

Coverage from Yahoo Sports Nfl · read original