The San Francisco 49ers were absolutely ravaged by injuries last season, which played a massive role in their disappointing 6-11. And once again this summer, the 49ers are once again experiencing medical issues. So, what is the reason behind San Francisco's inability to stay healthy? Is there a deeper problem here?

The San Francisco 49ers have seen changes in their injury list as some key players return while others remain sidelined.

SANTA CLARA – Nate Sudfeld rejoined the 49ers’ quarterback ranks Tuesday, three years after Brock Purdy beat him out as a rookie for the No. 3 role and an unexpected ascent to the franchise’s throne.

San Francisco 49ers cornerback Deommodore Lenoir hilariously explained how his friendship with Chase Lucas has evolved over the years.

Renardo Green and Isaac Guerendo were among those who returned for a practice in which Brock Purdy and Ricky Pearsall continued to connect.

Mac Jones will be sidelined for the remainder of the week and for the San Francisco 49ers ’ preseason finale against the Los Angeles Chargers on Saturday. 49ers coach Kyle Shanahan told reporters that Jones suffered a knee sprain and will be unavailable this week due to a knee sprain the quarterback suffered against the Las Vegas Raiders.

Las Vegas Raiders LB Elandon Roberts showcased his veteran skill set versus the San Francisco 49ers in Week 2 of the preseason.

Isaac Guerendo and Renardo Green stood out during San Francisco 49ers practice Tuesday as they returned from their respective injuries.