I can’t point out who may be the x-factor in any given group, but a lot of writers can. You read better things in Football Outsiders, Pro Football Focus, Real GM. Even in this site, Mays can probably write a much better list.

I read it again, and noticed Kelvin Benjamin. He’s a good player with room for improvement, but he was actually out for the whole season, and the Panthers were very successful. How is he an x-factor?

This is just a “players worth watching” list. Even when a real x-factor appears, the analysis is shallow. He seems like a good writer, who’s checking the right sources, but he should just focus on his point and put something more insightful.