I'll be honest, I don't remember anything about George Wrighster's NFL career. He's recently retired, I think albeit not by choice, which I guess technically makes him a free agent. Maybe he'll get picked up this season. Last year he was on a practice squad. I can't remember where.
But I do know that George Wrightster has blogged (George Wrightster's Yardbarker blog) and he's a good example of an athlete who harnessed the power of social media to build his own brand.