play
Why trading Jimmy G from the 49ers won't be easy (1:00)

The importance of moving on from Jimmy Garoppolo is discussed by Robert and Dianna. The song is called "1:00."

12:47 PM ET

The San Francisco 49ers' defensive line depth is being tested early in training camp, as defensive tackle Maurice Hurst suffered a torn bicep in Friday's practice.

He will most likely miss the whole season.

After the surgery, we'll see. I don't know if that's how biceps work out.

He injured his arm on a jet sweep run when he grabbed at the runner as his arm gave out.

Losing Hurst is a blow to the Niners' defensive line. On the same day, it was announced that Arik Armstead would be out with a knee injury. Ridgeway will be out for a couple of weeks with a mild quad strain.

As the Niners have been easing tackle Javon Kinlaw back in after his recovery from a torn rightACL suffered last season, the starting defense was being worked on.

It would be a repeat of last year's disappointing campaign. He was limited to two games and 40 defensive snaps last season due to ankle and calf injuries.

Robert Nkemdiche and Tomasi Laulile have been signed by the Niners in the last few days.

Kinlaw is expected to work in team drills in Saturday's practice after spending the first few days adjusting to his new surroundings.

He wants to see him play some football. Javon has everything in his body and he thinks he will be a great player.