“Head coach Kyle Shanahan confirmed Monday that defensive lineman Nick Bosa suffered a torn ACL in his right knee during Sunday's win over the Arizona Cardinals. Bosa will undergo season-ending surgery,” 49ers.com’s Briana Jeannel wrote.

While there's no hope for Bosa playing again this season, general manager John Lynch on Thursday did have an update on the DE's progress when he joined KNBR in San Francisco. Bosa is set to have surgery Friday ahead of the 49ers' Week 4 matchup against the Jacksonville Jaguars.

With Nick Bosa sidelined, the 49ers are predicted to trade for a four-time Pro Bowler to strengthen the pass rush. The 49ers struggle with pass rush due to major injuries, including Nick Bosa's torn ACL.

We know the 49ers have been calling teams about potential trades for pass rushers. They practically have no choice.

In spite of Bosa's absence for the rest of the year, as well as starting quarterback Brock Purdy and star tight end George Kittle still potentially sidelined for multiple weeks with injuries of their own, the 49ers are 3-0 and sit alone atop the NFC West. Every other team in the division is currently 2-1.