EAST RUTHERFORD, N.J. – The 49ers’ buzzard luck struck again.

They only had four minutes left Sunday in what figured to serve as their most lopsided and stress-free win all season.

They were up 17 points, then down went Mykel Williams.

It’s feared he tore his anterior cruciate ligament, and Williams instantly knew its severity as he reached for his right knee and banged his hands against his helmet while on his back on the MetLife Stadium’s ever-suspect synthetic turf.

He now follows the hobbled footsteps of fellow defensive ends Nick Bosa (ACL tear), Bryce Huff (hamstring) and Yetur Gross-Matos (hamstring). Williams’ rookie season seems as finished as linebacker Fred Warner’s after his ankle dislocation and fracture three weeks ago in Tampa Bay.

Williams, their first-round draft pick

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