AnnMaria De Mars

I have always argued that the best defense is a good offense. If you are attacking your opponent, half of their attention has to be spent on defending your attacks, so they are going to be much less effective in attacking you. Whether as a coach or competitor, it’s best to keep this in mind—You don’t fight principles, you fight people. I had a serious injury when I was young—I have since had a total knee replacement, an option that did not exist back then. Because of that disability, my standing technique was very limited and it was necessary for me to take the opponent to the ground as soon as possible before my knee gave out on me and I fell. Standing around waiting to defend an attack was not an option for me.

In 2013, De Mars was named in Forbes' annual list of the "40 Women to Watch Over 40" recognizing the accomplishments and backgrounds of women who are making major professional contributions after the age of 40, in the fields of innovation and disruption.

De Mars won her division at the USJA Junior Nationals at the age of 16 – her first major competition. The same year, she entered college at Washington University in St. Louis as a Business major. At the age of 18, as a college junior, De Mars was an exchange student at Waseda University in Tokyo, Japan. While there, she trained under Sensei Osawa.

In 2013, De Mars and Jimmy Pedro Sr. co-wrote the instructional book Winning on the Ground, published by Black Belt books.

In 2008, De Mars was hired by the University of Southern California ITS Customer Support Department as a statistical consultant. She has over 27 years experience working in SAS and has contributed through her many Wiki and Blog Pages. She supports both UPC and HSC Campuses including the satellite office in Orange County.

Following the move, De Mars remarried, and helped coach her daughter Ronda Rousey, to win a Gold medal at the 2004 World Junior Judo Championships and a Bronze medal at the 2008 Olympics. Ronda is now a professional mixed martial artist and a former UFC Women's Bantamweight Champion.

In 1995, De Mars' then-husband Ronald Rousey suffered a sledding accident which resulted in a broken back and chronic pain. Later, he was diagnosed with Bernard–Soulier syndrome, which complicated his pre-existing injuries and he was given a prognosis of two years to live. Following the suicide of her husband, De Mars moved her family back to Southern California and settled in Santa Monica, where she homeschooled her children.

De Mars began working for the Spirit Lake Reservation in 1990, where she wrote the first federal grant to tribes for early childhood tracking with special education staff from all the reservations in North Dakota. She also wrote and taught the first course offered over the internet by a tribal college. While there, De Mars performed evaluations for talent search, vocational rehabilitation, Health Careers Opportunity Program (HCOP), Even Start Family Literacy and SAMHSA Grants.

De Mars enjoyed more success in 1983, including the Pan American Games and US Senior Nationals, and in 1984, winning the Austrian Open, Canada Cup (now known as the "Rendezvous"), and the US Senior Nationals. She came out of retirement to win the 1984 World Judo Championships, becoming the first person representing the United States to win a World Judo Championships (her name at the time was Ann-Maria Burns).

De Mars earned her MBA in 1980. She missed the first women's world championships while in grad school, but in 1981 won bronze in the British Open and Tournoi d'Orleans. In 1982, she was ranked #1 in the USJI rankings and won the US Open. However, she did not contest the second women's world championships due to the birth of her daughter María. De Mars pursued further study, including an MA and PhD in Educational Psychology from the University of California, Riverside; which came in handy while teaching her daughter Ronda the proper mindset to take before fights.

She graduated from college with a degree in business in 1978. She also won the US Senior Nationals, US Collegiate Nationals and the US Open. In the absence of women's judo world championships, she quit competitive judo and studied for an MBA at the University of Minnesota.

AnnMaria De Mars (born August 15, 1958) is an American technology executive, author and judoka. She is the first American to win a gold medal at the World Judo Championships, competing in the -56 kg weight class, for the 1984 World Judo Tournament.

De Mars was born on Scott Air Force Base in St. Clair County, Illinois to Marcella Ann (née Austin) and Joseph Arthur Waddell (1927–2011). De Mars is the granddaughter of Dr. Alfred E. Waddell, one of the first Black physicians in North America. She was raised in the small community of Alton, Illinois.