Mack Hollins Makes Himself Heard Posted Aug 21, 2015 Sit in on a UNC football practice and one-word echoes out across the field above the crashing of pads and stomping of cleats, “Volume!” It does not take long to locate the source of this two-syllable sound. Just look towards number 13. Wide receiver Mack Hollins dons the number and the former walk-on adds his exclamation to nearly every drill. (Carolina Blue)