I don't think anyone has really come out of nowhere seemingly unknown to impact a game or whatever the spirit is for the Barney Fuckdoggle award.
The closest man to that description for me is: Robert Rochelle
Disagreed. The Ugly Irish, Dan Whelan, fits the mold of the underdog dog fucker. Cut by the Sinners. Played in the XFL. Beat out a handsome Irish. Whelan could be the best punter to don the Green and Mustard Yellow since Jon Ryan.
I'm not going to stop the wheel. I'm going to break the wheel.