HENDERSON, Nev. -- The feud between former NFL commissioner Pete Rozelle and late Raiders owner Al Davis was more than legendary, it set the stage for the NFL becoming what it is today -- a billion-dollar industry that is more national obsession than national pastime. ESPN's 30 for 30 special "Al Davis vs. the NFL" delves into the rivalry and debuts Thursday on ESPN (9 p.m. ET) and ESPN+. Here's a timeline of the events that brought Rozelle and Davis together and drove them apart.