Rob Dunphy (aka Dunphy215 or @Dunphy_215 or "The Philly sports tattoo guy”) has put his fandom and ink to great use raising money for a rare and uncurable form of childhood cancer. (Diffuse Intrinsic Pontine Glioma aka DIPG).
Although Phillies slugger Bryce Harper wasn't able to attend Dunphy's latest fundraiser (spring training and all) he did donate a signed bat for the cause and you can read all about it here.