Pittsburgh Steelers head coach Mike Tomlin had enough of wide receiver George Pickens' antics, which led to a trade with the Dallas Cowboys. One Steelers insider shared his thoughts on what might have been the last straw.

"I believe that Mike Tomlin is unfireable," former Pro Bowl safety Ryan Clark said Thursday on ESPN. "I believe if Mike Tomlin steps away from being the coach of the Pittsburgh Steelers, that should be his decision. And I've said time and time again: I do believe that should be the decision that he makes.