The 49ers on Monday released linebacker Donavin Newsom and four others in an effort to reach the 90-man offseason roster limit.
Newsom was waived as was outside linebacker Jimmie Gilbert, who went down with an ACL tear last summer. Both were undrafted rookies a year ago.
Newsom suffered a scary concussion during a training-camp practice in August. He was taken away by ambulance and spent two days in the hospital. He endured symptoms that included headaches, problems sleeping and issues with his balance until late December when they finally went away.
In a recent interview with The Bee, Newsom said he was finally cleared by doctors in January. He said he did not consider voluntarily stepping away from the game.
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"Not really," he said. "The main thing was waiting to see what the doctors said. If they gave me the go-ahead that I could play again, then that was always my first option."
In addition to Newsom and Gilbert, the team parted ways with safety Dexter McCoil, cornerback Channing Stribling and linebacker Boseko Lokombo.
The 49ers drafted nine players last week and are expected to bring in another 12 undrafted free agents. They will be holding a rookie minicamp starting Friday.