The Miami Dolphins fear Ryan Tannehill suffered a torn ACL in their 26-23 win over the Arizona Cardinals.
Tannehill was hit low late in the third quarter by Cardinals defensive tackle Calais Campbell and was knocked out of the game.
"We don't have it officially yet, but it doesn't look good," Adam Gase said.
The Dolphins will likely start Matt Moore in place of Tannehill.
"We don't have it officially yet, but it doesn't look good," Gase said.