The Rams will be without defensive tackle D’Marco Farr for a month. Farr suffered cartilage damage in his knee Monday night in the win over Denver, and will undergo arthroscopic surgery. The injury means Farr will miss the Rams’ game Sunday against Seattle in Husky Stadium, where Farr played his college football for the University of Washington. Jeff Zgonina will start in Farr’s place. Cornerback Todd Lyght might not play Sunday because of turf toe. Dre Bly would be his replacement. Receiver-punt returner Az-Zahir Hakim has a sprained knee, and is probable.