Miami quarterback Ryan Tannehill could be out for the rest of the NFL season after suffering a knee injury during the third quarter of the Dolphins' 26-23 victory over the Arizona Cardinals.
The NFL Network reports Tannehill is believed to have torn his ACL.
The injury comes with the surging Dolphins (8-5) in playoff contention thanks to seven wins in their past eight games.
Tannehill, 28, was hurt on a hit by Pro Bowl defensive end Calais Campbell and walked off the field with the assistance of Dolphins trainers.
He was replaced by veteran Matt Moore, who completed a 29-yard pass to Kenny Stills on the final drive to set up a game-clinching field goal by Andrew Franks.
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Asked about Tannehill's status after the game, Miami coach Adam Gase told reporters: "We don't know anything official yet, but it doesn't look good. We've just got to get the final results. We'll get it confirmed tomorrow."
