49ers Notebook: Shanahan on the Cardinals’ QB uncertainty, Williams’ plays, the Colorado weather; Lynch on Ndamukong Suh’s interest

Kyle Terada-USA TODAY Sports

Kyle Terada-USA TODAY Sports

The San Francisco 49ers are holding their three practice sessions this week at the United States Air Force Academy in Colorado Springs, about an hour south of Denver, to acclimate to the altitude. On Sunday, the team travels to Mexico City for Monday night’s game against the Arizona Cardinals at the Estadio Azteca.

Which quarterback does the 49ers defense face when they enter the field? Nobody is really sure. Both of the Cardinals’ quarterbacks deal with injuries on a daily basis. Kyler Murray is struggling with a hamstring injury that kept him out against the Los Angeles Rams last weekend, while McCoy works on a knee injury he sustained in that game.

Both quarterbacks practiced today but were limited and the 49ers are gearing up for both.

“They’re still going to attack similarly with both of them, so you have to be ready schematically,” head coach Kyle Shanahan said after today’s practice session. “There’s definitely some different skills and stuff, but we saw both of them last year. Our defense knows they both pose a problem when they face both and you need to be prepared for both.”

Concerned about tipping Trent Williams?

There was some speculation that left tackle Trent Williams could overturn plays at the line of scrimmage. The theory goes that the offensive lineman’s stance would allow opposing defenses to better understand what’s coming.

A reporter asked Shanahan if there were any concerns from the 49ers.

“It would definitely be a big deal [if true]but I’m not studying your viral videos… or anyone’s,” Shanahan said. “We’re pretty good with Trent.”

Change of plan due to weather?

It was below 30 degrees today while training in Colorado Springs. Tomorrow is supposed to be colder with the possibility of snow overnight. When the outdoor practice field is covered in snow in the morning, Shanahan and the 49ers will move practice indoors. Otherwise, the team continues to train outdoors despite the icy weather.

Any plan change is based solely on safety.

“We’re not going to train (indoor) on grass because we’re cold,” Shanahan said. “We will train on grass [if] the field is not safe.”

McCaffrey feels good

One player who has no problem adjusting to the cold Colorado Springs weather is running back Christian McCaffrey, who played high school football at nearby Valor Christian High School at Highlands Ranch.

It feels like home. It’s home,” McCaffrey told reporters, per Bay Area News Group’s Cam Inman. “Played a lot of games in this weather in high school and little league. It brings me back to the good old days. … It’s definitely cool. I had track meetings here in high school. Even the air is familiar once we land on the plane.”

Ndamukong Suh interest

The Philadelphia Eagles added experienced defensive tackle Ndamukong Suh today. Some wondered if the 49ers might have been interested given the injuries along the defensive line. Only one of the four starters – Nick Bosa – was available against the Los Angeles Chargers. The unit was without Arik Armstead, Javon Kinlaw and Samson Ebukam. Armstead and Kinlaw missed a lot of time.

Shanahan has already ruled out Kinlaw for Monday. The defensive tackle remains on injured reserve due to a setback in his reconstructed knee. He may return but has not traveled once with the team this week.

Armstead, who has not played since Week 4 with foot and ankle injuries, did not train this afternoon. It seems unlikely that he will return against the Cardinals.

Did San Francisco even think of Suh? Shanahan hinted that there might have been at least one some Interest.

“I know that [general manager] John [Lynch] looked at all these guys, so I’m sure he would have talked to him,” Shanahan said.

This afternoon on KNBR, Lynch confirmed the 49ers had expressed an interest in the defenseman. It just never worked.

“We spoke to him last year, and we spoke to him earlier this year, and it just never came to fruition,” Lynch said Tolbert & Copes Show. “I think ultimately it sounds like he really wanted the Eagles as a place to be and you can’t get them all. He’s a good football player coming to the end of his career but I’m sure he’ll help them and be a good pickup for the Eagles.”

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