Brandon Hagel has been placed in the NHL's COVID-19 protocol and did not practice with the Blackhawks on Friday, the team announced.
Hagel, 22, has 14 points (five goals, nine assists) in 35 games this season. He scored a goal and had two shots on net in Thursday's 4-3 loss to the Carolina Hurricanes.
Hagel has been one of the biggest bright spots for the Blackhawks and has become a dependable middle-six winger. It's unclear how long he'll be out of the lineup for, but his loss for now isn't ideal.
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The Blackhawks are scheduled to play the Nashville Predators at Bridgestone Arena on Saturday afternoon.