Hollins previously dressed up as Fred Flintstone for another pre-game wardrobe choice. The NFL athlete often opts to go barefoot, too. Here, see photos of Mack Hollins' pre-game style. More from WWD ...

The Flintstones and the Rubbles are modern stone-age families. Fred and Barney work at Slate and Company, mining rock. Fred gives Barney some money so he and Betty can adopt a baby. When Fred and ...