"I am excited about the opportunity," Green said. "Obviously, from a team standpoint, I wish I was standing here and we were 3-0 and the offense was playing great and the defense was playing great and none of these changes would be necessary. This is the position we are in and I am appreciative that Scott has turned to me and is letting me start the game and see what I can go out there and do.

"I have a pretty extensive background in the offense; I have been in it for a long time. I feel comfortable in it, the terminology and understanding where everybody is, and hopefully I can bring some kind of spark and make us more productive on offense."

When Green was in St. Louis from 1999-2000, the offense was similar with Mike Martz as offensive coordinator and then head coach. When Green was traded to the Chiefs in 2001, the offensive coordinator was Al Saunders, who was the Rams' receivers coach in 1999 and who brought the offense to Kansas City. Saunders is now the Rams' offensive coordinator.

Linehan insisted that Bulger shouldn't be the scapegoat for the team's struggling offense.

"I'm not happy with our team's performance," Linehan said. "Marc gets the brunt of it. That's what I told him when I met with him. I said Marc, the good and the bad comes with the quarterback position and right now I'm looking for something to spark our team, anything. Certainly we can use it.

"If you're going to blame anybody for our performance you blame me, not Marc Bulger. I take it all. It comes with the territory I'm in too. Don't blame Marc Bulger. I'm just trying to find a solution."

Bulger has been sacked 11 times this season and was sacked 76 times in 28 games in 2006 and 2007. He has appeared to often throw the ball too quickly because of a lack of trust in his offensive line. While he was sacked only once in Sunday's loss to Seattle and had more time than the previous two games, Bulger still seemed to lack faith in that line.

Linehan said of Green, "He brings a lot of background in the offensive system we're running now. He has a great presence about him and I think that is another thing that will be something he can bring along with his experience with Al's offense. This isn't his first rodeo so to speak. I think he just brings a lot of other things as well as his ability."

Green said a quarterback can't be thinking about whether he will be protected or not, and talked about the trust there has to be from everyone on offense.

"I tend not to focus on that," Green said. "I trust those guys to do their jobs just like they trust me to pick the right guy and put it in the right spot. The receivers trust me to have it in that area and I trust them to be at the right depth and their zones and where they need to be in their passing routes. That is the one thing that I lean on and I have leaned on for a long time. From an offensive standpoint there has to be a trust factor there. They have to trust that I am going to get rid of the ball, whether it is a five-step drop and get rid of the ball. I have to get rid of the ball, I can't sit there and hold on to the ball and take too much time.

"Once again I lean on the word trust and hopefully that develops over the week and they really understand what I am about because I really haven't had a lot of work with the guys that are in front of me."

With the Rams winless and having lost 16 of their last 19 games, Linehan wouldn't commit to either quarterback beyond this week.

"We're just concerned about this game," Linehan said. "There's no this is for how many games; this is for Buffalo. It wouldn't make much sense if you're looking further beyond this Sunday."

SERIES HISTORY: 10th meeting. Bills lead, 5-4. The only time the teams met in St. Louis was 1995, the first season the Rams played there after moving from Anaheim. Buffalo won, 45-27. In the last four meetings, which date back to 1992, the Bills have scored 155 points.