"At some point in his life, he made a decision not to."
Just like Nelson made the decision to compete clean. He had no choice.
When Nelson was a teenager, he was offered performance-enhancing drugs while training in an Atlanta gym. He promptly told his father.
"My dad said, 'You're always going to have the temptation to cheat. But if you do, I'm going to disown you,'" Nelson said. "As the conversation evolved, it culminated with me saying, 'Dad, I swear I'll never do performance-enhancing drugs.'
"That is one of my proudest achievements in the sport — trying to attain No. 1 in world and doing it the right way. It can be done."
Asked if he thought about celebration plans should he one day be presented with the gold medal, Nelson paused.
"You won't see tears of joy. I probably won't ever hear the national anthem or see it rise over the stadium in ancient Olympia. Those are things I missed out on," Nelson said. "Maybe I'll build a flag pole and hang it from there for a little while — just to do something over the top."