Seattle Seahawks coach Mike Macdonald knows his defense will have its hands full Thursday night against the 49ers’ vaunted offense.

Speaking on the “Brock and Salk” show Monday, Macdonald detailed how vicious San Francisco’s offense can be.

“If you’re not careful, they can gash you in a hurry,” Macdonald said (h/t Seattle Sports). “You can play 15 plays well in a row and the 16th play creases you … They’re a really good operation, have a ton of respect for those guys.

“I’ve been going against Kyle Shanahan since 2014. So, he’s familiar with what we do, we’re familiar with what he does, and we got to go out playing. That’s just the simple fact of the matter… The violence and precision on how they run their run game is really good. They hang their hat on what they do.”

Kyle Shanahan said the Jets’ decision this week to fire head coach Robert Saleh, a former defensive coordinator in San Francisco, caught him by surprise.

“I sent him a text but haven’t gotten to talk to him,” Shanahan said. “I was pretty shocked. That stuff throws you off, especially … [the Jets are] competing for first in the division this week and I think they’re up there on defense and they’ve got a pretty good team and chance to have a hell of a year. So it was pretty surprising.”

In speaking to reporters after the 49ers’ crushing 24-23 loss to the Arizona Cardinals on Sunday, Bosa discussed how Arizona’s offense was able to have much better success in the second half after struggling against San Francisco’s defense in the first two quarters.

“They were giving us a different look on the zone read,” Bosa said on Sunday. “I think in all our losses, the preparation we’ve had has been great. But teams are playing us different and doing things differently, and we need to adjust a little better.

“[They’re] just showing different looks than what we were looking at on tape. So [we] just got to adjust and get him down.”

With Jake Moody sidelined for multiple weeks with a high ankle sprain, the 49ers have signed veteran Matthew Kicker as their new field goal kicker.

Wright has previously spent time with the Pittsburgh Steelers, Jacksonville jaguars, Kansas City Chiefs and Carolina Panthers. He’s hit 40 of 47 career field goals in his career.

The Seahawks have run the ball less often than any team other than the Titans so far this season and the Titans have played one less game than the NFC West club, so no one is running the ball less often on a weekly basis.

Their offensive imbalance was never greater than it was in their Week Five loss to the Giants. Ken Walker III had five carries and Zach Charbonnet had two carries — quarterback Geno Smith also ran four times after protection broke down — as the Seahawks relied heavily on the air game. They had some good moments, but also gave up seven sacks as the Giants picked up on the lack of dimensions to Seattle’s approach.

Walker ran for three touchdowns in Week 4, which made the approach more surprising but not out of left field. Walker only had four carries in the first half of that game, which was a loss to the Lions, and offensive coordinator Ryan Grubb said on Tuesday that he needs to do more to get the ball into Walker’s hands.

“I’ll own that,” Grubb said, via the team’s website. “Got to get the ball to Ken more. And I think we had plenty of run game in the plan, didn’t have anything to do with not having enough calls for that, just didn’t get called. And for us, we leaned on the wrong thing. And I think if we get Ken 10 more touches, 15 more touches, things are going to look different.”

Brock Purdy took responsibility for his game-sealing fourth-quarter interception in the 49ers’ 24-23 loss to the Arizona Cardinals on Sunday at Levi’s Stadium.

Speaking to reporters on Tuesday, the San Francisco quarterback was asked what was going through his mind during the play.

“I got hit and so I’m like, ‘All right, how did that happen with that we had on?’ and we had two guys come to the side of where our protection was set, and one guy was free,” Purdy said “So that’s on me in terms of getting the ball out and not holding onto it.

“So, in that situation when I was walking off and looking at the video board I was like, ‘Man, did I just miss a guy or did I just try to get to [Brandon] Aiyuk the whole time and not see the blitz?’ So, in that moment that’s what I was thinking about, and I wish I would have executed it differently.”

Kyle Shanahan is known as one of the best coaches in the NFL but he has one thing going against him: a history of late losses. In a Week 5 loss to the Cardinals, San Francisco was up 10 points midway through the fourth but a fumble by running back Jordan Mason and an interception by Brock Purdy kept Arizona in the game.

This came two weeks after blowing a 24-14 lead in the fourth quarter to the Rams. It was the sixth time the 49ers have blown a double-digit lead in the fourth quarter of a regular season or playoff game under Shanahan.

“It’s super frustrating,” All-Pro left tackle Trent Williams told members of the media after the game. “Obviously, we have to figure out how to close out games and how to get teams out early when we have the chance.”