Will the 49ers sign depth at defensive tackle amid injuries?

The San Francisco 49ers defeated the Arizona Cardinals 45-29 on the road Sunday, leading to their 11th win of the season, an NFL-high.

While the offense churned to the tune of 45 points, the defense struggled, giving up 29 points, which was the most San Francisco has allowed over their six-game winning streak, as well as the most Arizona has scored all season.

How did the defense struggle on Sunday?

Head coach Kyle Shanahan pointed to fatigue and tackling as key issues, which stemmed because the 49ers were extremely thin along the defensive line, missing both Arik Armstead and Javon Hargrave, while Kalia Davis left with a high-ankle sprain.