The Minnesota Vikings will keep wide receiver Justin Jefferson off the field for a while because of a mild strain of his left hamstring.

Justin Jefferson left practice Thursday with a left hamstring strain, but the injury may not be anything to worry about. An MRI revealed a “mild strain” in the Vikings’ star wide receiver’s left hamstring after he removed himself from training camp and is expected to be re-evaluated next week, according to ESPN.

Vikings head coach Kevin O'Connell announced on Friday that superstar receiver Justin Jefferson will miss some practice time during training camp with a mild left hamstring strain. Exactly how much time he'll miss is unclear,