That is former Cleveland Brown George Buehler back in the day taken by teammate and amateur photographer Jerry Sherk. George, if you couldn't tell, was a fan of the Coneheads. Also notice the Browns spelled his last name incorrectly on his locker.
Sherk has had his photography exhibited around the country in the last year. You can view many, many more completely badass snaps, including oodles of awesome vintage Browns pics, in the this gallery, and you can follow his Tumblr here.