Seahawks' Richard Sherman leaves after injuring heel in 3rd quarter

— -- GLENDALE, Ariz. -- Seattle Seahawks cornerback Richard Sherman left Thursday night's 22-16 win over the Arizona Cardinals in the third quarter because of a heel injury.

Sherman did not return to the game. The NBC broadcast appeared to show him mouth the words "tore my Achilles" twice after he left the field. He remained standing on the Seahawks' sideline in full uniform but without his helmet.

Sherman was on Seattle's injury report last week because of his Achilles. He was listed as a non-participant all three days, though the team held walkthroughs and his participation was an estimation of what would have occurred in a normal practice.

Sherman has never missed a game since entering the league in 2011.

Injuries have piled up in this game for the Seahawks. Defensive tackle Jarran Reed (hamstring) and left tackle Duane Brown (ankle) both left in the first half. Running back C.J. Prosise (ankle) left in the third quarter.