Armstrong was a dual threat quarterback coming out of college. His issue was size, arm strength and completion percentage. Despite being a big playmaker at Nebraska. He only completed 53 percent of his passes. After college, Armstrong didn't receive a combine invite. He went undrafted. The NFL tried to get him to work out as a wide receiver. He got a tryout with Minnesota at Running Back. He then signed as a safety. A position, he played in High School. He was cut a month later. So the idea of him changing positions has always been there.
Armstrong has great athletic ability, so I can see why some leagues and teams would want to see him try out there. To me, he's a #3 QB, who I would use to return kicks. Similar to how Brad Smith, was used with The Jets. He was their wildcat QB, played WR and was a pro bowl caliber kick returner.