The fear is that 49ers' RB Jerick McKinnon tore his ACL, per source. He is scheduled to have an MRI to see the extent of the injury.
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Kyle Shanahan said 49ers' RB Jerick McKinnon hurt his knee in practice today and "we're nervous about it, that's for sure."
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Miners RB Jerick McKinnon suffered an injury today, sources tell me and @RapSheet. Efforting more details.
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