From what's in the wiki, there's no current calf injury for Nick Bosa to report on in the 2026 season. His main recovery focus is from the right ACL tear he suffered back in September 2025. Per the wiki (from the Nick Bosa page), he's on track for a Week 1 start in Australia (Sept. 10), with the 49ers targeting a late July or early August return to full practice — and the tear was clean with no meniscus damage, so the timeline has stayed on schedule through mid-July.
The expert clip from Establish The Run that mentions a "mild calf strain" and "Achilles tendonitis" appears to reference a past issue (likely from a prior season), not a new 2026 injury.
If you're asking about a specific recent report I haven't found, could you share where you saw it? I can dig deeper.