By now, you've seen dozens of spots like this one.
Hard to believe, but Mayhem (Dean Winters) has been around for six years. In that time, Winters has parlayed the gig into a brief primetime run (Battle Creek, which was a summer series last year), and it's the first steady gig he's had that we know of. As long as Allstate doesn't run out of topics to use Mayhem, he's going to be appearing during sporting events for a while to come.
Rating for the series: A.