Marcus Derwin Oliveira, “The Phenom Menom,” was born on March 18, 1979, and raised on the Menominee Indian Reservation in Keshena, Wisconsin. He began boxing at the age of seven years old and went on to have a very impressive and decorated amateur record of 375+ fights and only lost 30 times. With his impressive skills, aggressiveness and unmatched strength inside the ring, he earned himself a spot training at the Olympic Training Center in Colorado. Marcus went on to make it to the Olympic Trials, losing by only one point to make the USA Olympic team. 

In April of 2006 Oliveira made his much-anticipated professional debut with a knockout win against Daniel Russell. Marcus went on to win his next six fights by knockouts, five of them being in the first round. Due to Marcus’ extraordinary boxing skills he was approached in 2010 by legendary boxing promoter Don King and was immediately signed to Don King Promotions. He went on to fight some of the top fighters in his light heavyweight division to become ranked #1 in the world for two years.

Marcus held several titles and belts, including ABF, WBA fedebol, and NABA. In his professional career he had an impressive record of 38 fights, with 28 wins and 22 by way of knockout, nine losses and one draw. Marcus retired from boxing in 2023 and currently resides in Lawrence, Kansas and focuses his time raising his son and daughter, and working for the environmental protection agency on the Prairie Band Potawatomi Indian reservation in Mayetta, KS. He is married to Shiloh LeBeau-Oliveira, 2023 NAIAHF inductee.

In his spare time he and his wife travel for speaking engagements and hosting boxing workshops on different Native American reservations to inspire, motivate and encourage the youth to live a positive healthy lifestyle while helping them to build confidence, discipline, and skills through the sport of boxing.