He isnt a dual threat. Dual threat is russsel wilson and deshaun watson. They can beat you running and throwing.
Mayfield is like rodgers they have enough mobility to be able to run if needed but they arent going to beat you running.
Mayfield isn't a dual threat. Dude runs a mid 4.8, never ran for more than 140 yards in a season in college and only had 130 last year. Russell wilson is a dual threat.