Kansas City, Mo. ? Left tackle Kyle Turley will not play Sunday against Arizona, Kansas City coach Herm Edwards said Thursday.

Also out will be backup offensive lineman Will Svitek and reserve linebacker Rich Scanlon. They will join quarterback Trent Green, reserve running back Michael Bennett and defensive back Benny Sapp on the sideline.

The thinning number of offensive linemen even forced an unusual move Thursday at practice when defensive tackle Lionel Dalton was asked to work with the scout team – at guard.

“The problem you have is you run out of players, it puts a strain on everyone else in practice. Sometimes you lose sight of that,” Edwards said. “Lionel Dalton got the game ball. He did a great job. I told him he’s a two-way player.”

Scanlon and Svitek both went down with knee injuries during practice on Wednesday.

Turley, trying to come back from a two-year absence brought on by back surgery, has been out two weeks with a sore and stiff back. He has been able to do only limited individual work and not participate in team drills.

His backup, Jordan Black, played well last week in a 41-0 victory over San Francisco. But the Chiefs (1-2) lost their only road game this year, and during the previous five years were only 16-24 away from Arrowhead Stadium while winning at a .700 clip at home.

Edwards, who made road success one of his main goals when he replaced Dick Vermeil this year, anticipates an energized crowd Sunday in Arizona, where rookie Matt Leinart will make his first NFL start.

“I thought Jordan did a good job,” Edwards said. “He’s going to get a good test this week. We’re playing on the road in a hostile environment. One of the end zones is very, very loud, so both tackles will have a little stress on them, especially if we fall behind or we’re in two-minute and we’ve got to throw the ball. That’s what we’ve got to guard against.”

In their only other road game this year – Damon Huard’s first start in place of Green – the Chiefs managed only two field goals in a 9-6 overtime loss at Denver.

“Winning on the road is a matter of playing good football and taking care of business,” safety Sammy Knight said. “It’s something this team has not done yet.”

Another of Edwards’ stated goals was to revamp and revitalize a sagging defense, and that seems to be taking place. The Chiefs have not given up a touchdown in 10 straight quarters and rank No. 3 overall in the league this week.

It may not be the best opportunity for Leinart to make his first start. Confronting the former Southern California All-American when he lets fly with his first pass as an NFL starter will be a secondary that packs 37 years of experience and 142 career interceptions.

Standing on one side will be cornerback Ty Law, who led the NFL last season with 10 picks. Opposite him will be cornerback Patrick Surtain, who has 37 career interceptions and a strong feeling the sheer weight of the experience of the Kansas City secondary could be unnerving to a rookie quarterback.

“But it’s probably going to affect him only the first couple of series,” Surtain said. “After that, just relax and play football.”

In the backfield with Leinart will be veteran running back Edgerrin James. On his flanks will be some quality wide receivers.

“The guy he has in the backfield, he can hand the ball off to him 12 straight times and not feel any pressure,” Surtain said.

“They have a lot of confidence in this guy,” he said. “That’s why they drafted him so high. They’re going to do what they do. It will be up to us to make the plays.”