In Part 5 of his book, Greenlights, McConaughey relates an anecdote about a country musician who was struggling with addiction. The actor tells about "Larry" being confronted by the late University of Texas football coach Darrell Royal while under the influence at a party in the 1980s. Talking to People, Gatlin confirms he's the singer in the book, saying he hopes his story can help someone else. "I remember the day, it was October something of 1984," Gatlin tells People. "Coach Royal and I were talking. We had hit it off right away. For me, he was one of those people that you meet, and yo...