Five 49ers to watch as team looks to remain undefeated in Week 4 vs. Jaguars

The 49ers’ 2025 NFL season took a dramatic turn in Week 3, when star defensive end Nick Bosa was lost for the year with a torn anterior cruciate ligament in his right knee.But all is not lost.The 49ers head into Sunday’s game against the Jacksonville Jaguars with a 3-0 record, including an all-important 2-0 mark within the NFC West. With road games upcoming against the Los Angeles Rams and Tampa Bay Buccaneers, the 49ers know they have to take care of business at Levi’s Stadium in Week 4.“You can’t lose these types of games, and I know we’re going against a very good team,” coach Kyle Shanahan said this week on “49ers Game Plan.” “I know there are some situations that we need to overcome, but I’ve felt the same way these last three weeks. They can go either way, and we’re sitting here at 3-0, but just a few misplays, a few little different things, and we could be 0-3. And I know this game’s going to be the exact same.”Brock Purdy appears to be tracking toward a return to the lineup against the Jaguars after missing two games with a toe injury. But neither he nor Mac Jones (knee) was...