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Receiver Jaden Mitchell settles under a punt as spring practice continues for the Arizona Wildcats, March 5, 2020, Tucson, Ariz.

Arizona Wildcats receiver Jaden Mitchell has suffered a knee injury of unknown severity.

Mitchell posted a picture of himself on Instagram in which he has crutches and a wrap and brace on his right knee.

“So many emotions and not a lot of words,” Mitchell posted. “Just know this is gonna be a hell of a story.”

Mitchell is a redshirt freshman who already has been through a lot in terms of his health. He delayed his enrollment to Arizona after suffering a season-ending injury to his left knee in high school in August 2017.

This summer, Mitchell contracted COVID-19. He had to quarantine for four weeks and lost 14 pounds.

“This virus is no joke,” Mitchell wrote at the time on Twitter.

Mitchell is a 5-9, 175-pound slot receiver who was working toward a role in the rotation this season after redshirting in 2019.

More should be known about Mitchell’s status Monday afternoon, when UA coach Kevin Sumlin addresses the media. Arizona opens the 2020 season on Saturday at Utah.

Study up for the 2020 Arizona Wildcats football season with our 16-page special section. Includes a look at Kevin Sumlin's third UA team, Greg Hansen's guide to all things UA and Pac-12, and a glimpse at the conference race as the season nears.

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Contact sports reporter Michael Lev at 573-4148 or mlev@tucson.com. On Twitter @michaeljlev