Billy Conn held a secure lead on the scorecards leading to round 13. According to many experts and fans who watched the fight, Conn was outmaneuvering Louis up to that point. In a move that Conn would regret for the rest of his life, he tried to go for the knockout in round 13, and instead wound up losing the fight by knockout in that same round himself. Ten minutes after the fight, Conn told reporters, "I lost my head and a million bucks,". When asked by a reporter why he went for the knockout, Conn replied famously: "What's the use of being Irish if you can't be dumb?"

Billy Conn - Wikipedia, the free encyclopedia