However, the silver lining is that both players are expected to be fully cleared for training camp, set to commence at the end of July.
"I've had that surgery myself when I was playing, and it's a pretty high success rate of healing," Lynch stated. "And it feels a lot better once you get it done because it hurts constantly having that core tugging at you. So those guys both got that fixed."
Lynch further revealed that linebacker Dre Greenlaw is targeting a Week 1 return after sustaining a torn Achilles in Super Bowl 58 last month. However, given the severity of the injury, that is far from certain.
The 49ers believe Greenlaw might begin the season on the physically unable to perform (PUP) list.
"Dre will tell you he's going to be back Week 1," Lynch said with a smile. "I don't put anything past Dre, but we have to be smart. Maybe a PUP situation."
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