Johnson, a 6-foot-1, 245 pound prospect, chose Carolina over offers from Auburn, Louisville, Mississippi State, Southern Miss and Vanderbilt.
He was recently named one of the top 10 performers at the Atlanta NFTC by Scout.com recruiting analyst Chad Simmons.
"Johnson is full of energy and he played with a lot of it throughout this event," he said. "He and [OT Shamire] DeVine went at and both had their moments. Will he be a rush end or a linebacker on the next level? That is the question right now, but he will be a contributor no matter where he plays. He is versatile, he adapts well, and he plays hard."
Johnson was recruited by defensive coordinator Lorenzo Ward.
The 6-foot-3, 220 pound Washington took home top DL honors at the Orlando NFTC and also found himself on Simmons' top 10 list from that event.
"It was all about speed for Washington today," he said. "He is very quick off the ball, he is quick to get around the offensive tackle, and he won many of his one-on-one battles Sunday because of that speed. He could be a linebacker on the next level, but today he worked at end, and he was very successful. He was named MVP by the coaches."
Washington was recruited by running backs coach Everette Sands.
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