The San Francisco 49ers have avoided any major injury problems through the first three practices of training camp, but they may be without one of their starting cornerbacks for a period of time.

According to reports from camp, second year CB Renardo Green exited Friday’s session early. NBC Sports Bay Area’s Jennifer Lee Chan noted on Twitter that Green “came off the field a little gimpy.” He didn’t return to practice and appeared to be trying to stretch out his hamstring per Chan’s report.

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The 49ers have to hope the injury isn’t anything major. Green put together a strong rookie campaign after being selected 64th overall in last year’s draft. He’s in line to start alongside Deommodore Lenoir at CB this season.

San Francisco’s depth is okay the position, but it’s not a spot the club probably feels great about if they have to dig too far into their depth chart. Free agent signee Tre Brown has gotten first-team work in the slot. He’ll likely be first up to hold down a starting job on the outside if Green does have to miss time. That would pave the way for rookie third-round pick Upton Stout to get more first-team reps in the slot.

It’s unlikely we’ll get an update on Green on Saturday since it’s a day off for the 49ers. They’ll return to practice Sunday at which point there should be an update on his status.

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This article originally appeared on Niners Wire: 49ers injury news: CB Renardo Green leaves practice early