Twice recognized as world boxing champion in his weight class, Lou Brouillard was known for his punishing punching power and rugged fighting style. He had four successful years in the amateur ranks before turning professional in 1931 at the age of 20. In his first year of pro, Brouillard quickly fought his way to the top. He beat Jack Thompson on points after a grueling 15 rounds to claim the world welterweight title in 1931. He lost his crown, however, to Jackie Fields the next year. The following year, 1933, Brouillard moved up to the middleweight class. He continued to win significant bouts with a fighting style that journalists described as "primitive" and "savage." His inexhaustible strength earned him the world title once again, as recognized by the New York Commission, when he knocked out Ben Jeby. Brouillard's savage power, however, was not always enough to beat the most skillful fighters. He was outboxed and outpointed by Vince Dundee in Boston, losing his world title a mere two months after earning it. Brouillard tried to reclaim the championship but lost to then-champion Marcel Thil, both times on fouls. After the second disqualification, the International Boxing Union barred Brouillard from fighting for one year and suspended his manager for life. Although Brouillard participated in a number of important fights during the late 1930s, his career was now effectively at an end. After retiring from the ring, he served in the U.S. Army during the Second World War before settling in Hanson, Massachusetts. The rugged Brouillard, who had been knocked out only once in his professional career, left behind an outstanding professional record. In 140 bouts, he won 66 by knockout and 43 by decision.