SEATTLE — Seattle Seahawks linebacker Lofa Tatupu will miss the rest of the season after tearing his left pectoral muscle in today's game against the Arizona Cardinals.

Seattle coach Jim Mora said after the Seahawks' 27-3 loss that Tatupu will undergo surgery and be done for the season. Mora calls Tatupu's injury a "tough blow" for a team already hurt by injuries.

Tatupu, a three-time Pro Bowler, appeared to get hurt while tackling Cardinals receiver Larry Fitzgerald late in the second quarter. Tatupu walked off holding his left chest area and with his left arm appearing limp.

Two team doctors and three trainers attended to him briefly on the bench. A doctor pressed on Tatupu's shoulder, and the linebacker reacted with a painful jerk.

A physician then escorted Tatupu into the locker room. David Hawthorne replaced him.