The New England Patriots’ 23-20 win over the Buffalo Bills on Sunday night came at a cost.

Running back Antonio Gibson, who was unable to finish the game because of a knee injury, has been diagnosed with a torn ACL and will miss the rest of the season. Ian Rapoport of NFL Network was first to report the extent of the injury.

Gibson, 27, remained down after a 24-yard kickoff return in the second quarter. While he was able to gingerly walk off the field under his own power, he quickly left for the locker room after a brief trip to the blue medical tent. The team ruled him out for the remainder of the game shortly thereafter, which was already an ominous sign.

Joining the Patriots on a three-year, $11.25 million free agency deal last offseason. Playing roughly one third of the team’s offen

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