Question: What is the name of the American Boxing and MMA trainer who founded Grudge Training Center in 2009?

full_context: Document 1: Floyd Mayweather Sr.: Floyd Mayweather Sr. (born October 19, 1952) is an American former professional boxer who competed from 1974 to 1990, and has since worked as a boxing trainer. Fighting at welterweight during the 1970s and 1980s, Mayweather Sr. was known for his defensive abilities and overall knowledge of boxing strategy. He is the father and former trainer of five-division boxing champion Floyd Mayweather Jr., and is credited for teaching his son the defensive skills that made him a champion.
Document 2: Trevor Wittman: Trevor Wittman (born March 5, 1974 in Denver, Colorado) is an American boxing and MMA trainer.
Document 3: Freddie Roach (boxing): Frederick Steven "Freddie" Roach (born March 5, 1960) is an American boxing trainer and former professional boxer. Roach is widely regarded as one of the best boxing trainers of all time. He is the enduring boxing coach of the eight-division world champion Manny Pacquiao, five-time and four-division World Champion Miguel Cotto, former WBC Middleweight Champion Julio César Chávez, Jr., defensive master and three-time world champion James Toney, former UFC Welterweight Champion Georges St-Pierre, as well as top prospects Jose Benavidez, Peter Quillin, and Vanes Martirosyan. Roach was the trainer of former two-time world champion and notable women's champion Lucia Rijker. He has also trained former junior welterweight champion Amir Khan.
Document 4: Kenny Adams: Kenneth "Kenny" Adams (born September 25, 1940) is an American professional boxing trainer and a former amateur boxer. Adams is a highly respected boxing trainer, having been inducted into the Missouri Sports Hall of Fame in 2010. Adams is a pioneer in boxing, having been the first American trainer to implement strength training. He is also the first African-American selected as head coach of the American national boxing team. Adams brings such a strict disciplinarian training style that the eight-time, five-division World champion Floyd Mayweather, Jr. refused to work with him. In 1999, the multiple-time World champion Wladimir Klitschko asked Adams to assist him in properly turning over his fist on the left hook for power. In 2005, eight-division World champion Manny Pacquiao requested to train with Adams, but Adams declined to aid to his ill wife at the time.
Document 5: Matt Hume: Matt Hume (born July 14, 1966) is an American mixed martial artist. He is the founder and head trainer at AMC Pankration in Kirkland, WA, which is home to UFC flyweight champion Demetrious Johnson, ONE bantamweight champion Bibiano Fernandes and he has trained numerous world class fighters including Josh Barnett, Tim Boetsch Bob Sapp, Chris Leben, Hayato Sakurai, Akira Shoji, Matt Brown, Rich Franklin, Mario Miranda and Caros Fodor.
Document 6: South Coast Martial Arts: South Coast Martial Arts or South Coast Martial Arts Training Center is a Martial Arts School located in the United States city of Costa Mesa, California. Founded by Joaquin Sahagun and Gina Sahagun in 1993, South Coast Martial Arts has become a staple of its Orange County community, best known for achievements in the realm of martial arts instruction and youth outreaches. The school's motto is to raise students under the rich traditions from a variety of different arts in order to better develop positive role models for local and worldwide communities.
Document 7: Travis Fulton: Travis Fulton (born May 29, 1977) is an American mixed martial artist and a professional boxer in the heavyweight division of both sports. Known as a longtime veteran in mixed martial arts, he has competed in over 300 sanctioned bouts and while he is perhaps best known for competing in smaller US-based promotions, he has also competed in the UFC, the WEC, Pancrase, the Chicago Red Bears of the IFL, King of the Cage and RINGS. He also holds the record for the most sanctioned mixed martial arts bouts, with 316.
Document 8: Wolfslair MMA Academy: The Wolfslair MMA Academy is a fight team and training camp for mixed martial artists and kickboxers, headquartered in Widnes, England. The school was founded by Liverpool MMA fans Anthony McGann and Lee Gwynn. The academy earned publicity from their signing of former UFC light heavyweight champion Quinton Jackson, former UFC heavyweight Cheick Kongo, and current UFC middleweight champion Michael Bisping to training and managerial contracts. With these signings, Wolfslair became noted as one of the most prominent training stables in the UK's MMA scene.
Document 9: Xtreme Couture Mixed Martial Arts: Xtreme Couture Mixed Martial Arts is an American mixed martial arts training organization headed by former UFC Champion and former co-founder of Team Quest, Randy Couture. Xtreme Couture was founded with the flagship gym in Las Vegas. Since then, the franchise has spread to other cities in the United States and Canada. Xtreme Couture Las Vegas is one of the largest gyms (over 24000 sqft ), most recognized brands and MMA gyms in the world where many past and current top MMA fighters train.
Document 10: Korea National Training Center: Korea National Training Center, also known as the Taereung Training Center, located in Gongneung-dong, Nowon-gu, in the northeast part of Seoul, is the only national athletic training center of South Korea.
Document 11: Pepe Correa: Jose "Pepe" Correa is a boxing trainer who has trained Sugar Ray Leonard, Roberto Durán, Lennox Lewis, Simon Brown and Maurice Blocker. He was one of the trainers on the 3rd season of the boxing reality TV series, The Contender, premiering September 4, 2007 on ESPN.
Document 12: Grudge Training Center: Grudge Training Center (GTC) was a mixed martial arts training center founded by coach Trevor Wittman in 2009. Originally located in Wheat Ridge, Colorado, GTC relocated to Arvada, Colorado in 2013. The gym was an affiliate of Jackson's Submission Fighting. To devote more attention to his sports equipment company ONX Sports, Wittman closed Grudge in November 2016, with Grudge trainer Jake Ramos opening the Genesis Training Center to assume most of Grudge's former personnel, membership and operations.
Document 13: Team Hammer House: Team Hammer House is a mixed martial arts team operating out of Columbus, Ohio, made up of mostly former NCAA wrestlers. While Hammer House focuses on amateur wrestling they do have cross training deals with notable fighters and camps such as Matt Serra, Pat Miletich and Xtreme Couture Mixed Martial Arts. Founded by former UFC champion Mark Coleman, Team Hammer House has attracted such mixed martial arts fighters as Kevin Randleman and Phil Baroni.
Document 14: Evolve MMA: Evolve Mixed Martial Arts is a chain of martial arts academies and home to one of the leading teams in mixed martial arts. Founded by Chatri Sityodtong, it opened in January 2009. In December 2016, Chatri Sityodtong was named the Most Powerful Person in Asian MMA by Yahoo! Sports.
Document 15: ZenQuest Martial Arts Center: ZenQuest Martial Arts Center, formerly called the Okinawan Karate School, is a martial arts school located in Lenox, Massachusetts. The oldest martial arts school in Berkshire County, it was founded in 1972 as a dojo for Uechi-ryu karate. The school since expanded to include other martial arts, and currently provides instruction in Shohei-ryu karate (a spin-off of Uechi-ryu), Brazilian jiu-jitsu, mixed martial arts, Muay Thai, boxing, wrestling, kobudo, and self-defense, and is the fastest growing martial arts community in Berkshire County. The school also contains a store which provides equipment, gear, and instructional media. It is affiliated with the Okinawan Karatedo Association, Demian Maia Jiu-Jitsu Association, and Team Sityodtong Boston, and is accredited by the North American Grappling Association. ZenQuest has received significant coverage by regional and local media in Berkshire County, including "The Berkshire Eagle", "Berkshires' Best Buys, Business, and Beyond", and Pittsfield Cable Television, for its regular youth tournaments and seminars with high-ranking officials from the school's parent organizations.
ground_truth: Trevor Wittman