Alex Smith has seen the numbers that suggest the Kansas City Chiefs should be able to move at will Sunday at the Coliseum.

The Raiders are giving up 452.6 yards per game, dead last in the NFL. They’re giving up 7.0 yards per play, the most in the league, and considerably higher than the 6.6 the New Orleans Saints gave up a year ago when they were considered to have one of the most porous defenses in NFL history.

More concerning to the Chiefs quarterback is the a plus-7 turnover differential, third in the NFL and a category Kansas City has excelled in for years.

“They’re flying around, (forcing) a bunch of turnovers, running to the football,” the Chiefs quarterback said Wednesday in a conference call. “Yeah, they’re giving up some yards, but they’ve played some good offenses and that’s kind of inflated that.”

Smith notes the Raiders 4-1 record and the fact that they’ve managed to make some stops when it matters most.

“They’ve played in some close games and are battle tested and I think more mature than last year,” Smith said. “A lot of those players have had a lot of experience at this point and I think you’ve seen them be able to handle those situations.”

Smith, in his fourth year with the Chiefs after eight years with the 49ers, went deadpan when asked about the addition of Bruce Irvin to go along with Khalil Mack as a second threat from the edge.

“As I quarterback, I’m really not trying to pay attention to those guys,” Smith said dryly. “Certainly, any time you’ve got two edge rushers of that ability you have to be aware of it. When you’re playing, your attention is down the field, but you can’t be done with them. They deserve that respect.”

Smith, 32, gave glowing reviews to Raiders quarterback Derek Carr, who he has opposed four times in the last two years.

“He’s played so well from his first opportunity,” Smith said. “He’s certainly a guy with a lot of cool, and I think what jumps out is how fast he plays for a young guy. He throws early, anticipates. I think that’s the name at of the game at this level, to be able to play fast, anticipate things. Certainly physically, he’s got a lot of tools.”

While Smith was willing to talk about Carr, he didn’t have much to say about Colin Kaepernick, with whom he played with on the 49ers in 2011-12. Smith, in the midst of a season where he had a career best 8.0 yards per pass attempt and a 104.1 passer rating, lost the starting job to Kaepernick after a concussion.

The 49ers traded him the following season to the Chiefs, and since 2013 Smith has a 32-18 won-loss record with 66 touchdown passes and 21 interceptions, as opposed to 22-18 for Kaepernick with 46 touchdowns passes and 23 interceptions.

Asked whether he had any thoughts on Kaepernick regaining his starting job or if he recalled the younger quarterback having concern for social issues while they were teammates, Smith took the high road.

“I got nothing,” Smith said. “I’m so far gone from that I’ve got no idea what’s going on there. It’d be hard for me to even comment.”