Question: Miletich Fighting Systems is a training camp for the MMA fighter who has a background in what other discipline?

Documents:
source: Matt Hughes (fighter)
text: Matt Hughes (fighter) Matthew Allen Hughes (born October 13, 1973) is a retired American mixed martial artist with a background in wrestling. He is a two-time UFC Welterweight Champion, UFC Hall of Fame inductee, and NJCAA Hall of Fame inductee. During his tenures in the Ultimate Fighting Championship, Hughes put together two separate six-fight winning streaks, defeated all the available opposition in the welterweight division, and defended the belt a then-record seven times. Hughes was inducted into the UFC Hall of Fame in May 2010 during the UFC Fan Expo in conjunction with UFC 114.

source: Miletich Fighting Systems
text: Miletich Fighting Systems Miletich Fighting Systems (MFS) is a mixed martial arts (MMA) training organization. It is recognized as an excellent training camp. It has been the training camp for fighters such as Matt Hughes, Tim Sylvia, Jens Pulver, Robbie Lawler, and Jeremy Horn. MFS is widely regarded as one of the most successful MMA camps of all time.

source: Finney's HIT Squad
text: Finney's HIT Squad The Hit Squad, formerly known as Finney's HIT Squad under Jesse Finney and originally as H.I.T. Squad, is a mixed martial arts gym based out of Granite City, Illinois. Founded in 2007 by UFC Hall of Fame inductee Matt Hughes, it was purchased in 2011 by MMA veteran Jesse Finney after he retired from professional competition. Hughes departed from Miletich Fighting Systems in order to start the team, alongside then-current EliteXC Middleweight Champion Robbie Lawler, longtime boxing coach Matt Pena, and wrestling/conditioning teacher Marc Fiore.

source: Mark Hughes (fighter)
text: Mark Hughes (fighter) Mark R. Hughes (born October 13, 1973) is a retired American mixed martial artist. He trained with the Miletich Fighting Systems along with his twin brother, UFC Hall of Famer and former two-time UFC Welterweight Champion, Matt Hughes.

source: Sam Hoger
text: Sam Hoger Samuel Earl Hoger ( ; born June 28, 1980) is an American mixed martial artist and an actor, most notable for appearing on the first season of "The Ultimate Fighter", a reality television series produced by the Ultimate Fighting Championship and broadcast on Spike TV Hoger has trained with Miletich Fighting Systems in Bettendorf, Iowa and is belted in the Miletich Fighting Systems. Hoger is currently teaching and training out of Hoger Mixed Martial Arts in Houston, TX.

source: Jason Black
text: Jason Black Jason Douglas Black (born August 15, 1972) is a retired American mixed martial artist who competed in the Lightweight and Welterweight divisions. He is a veteran of the King of the Cage, UFC, and PRIDE Fighting Championships organizations, a former UCC title holder, and trains with the "Miletich Fighting Systems" camp.

source: Championship Fighting Alliance
text: Championship Fighting Alliance Championship Fighting Alliance (CFA) is a mixed martial arts (MMA) based promotion company located in Miami Lakes, Florida. It was founded by former MMA fighter and promoter Jorge De La Noval in 2011. It has currently produced 10 live events. Fallon Fox, who currently is signed to fight for CFA, is the first openly transgender MMA fighter in history. On May 24, 2013, CFA will be hosting CFA 11, their 11th event at the Bankunited Center located on the University of Miami campus. Fighter 411 reported that CFA had held the most events in Florida during the 2012-2013 season.

source: Justin Eilers
text: Justin Eilers Justin Eilers (June 28, 1978 – December 25, 2008) was an American professional mixed martial artist, formerly with the UFC, WEC and EliteXC. He trained with Miletich Fighting Systems in Bettendorf, Iowa.

source: Pat Miletich
text: Pat Miletich Patrick Jay "Pat" Miletich ( ; born March 9, 1966) is a retired American mixed martial artist and a current sports commentator. He is known for his fights in the Ultimate Fighting Championship, where he became the first UFC Welterweight Champion and UFC 16 Welterweight Tournament Winner. Miletich is also known as a highly successful trainer and coach, having founded Miletich Fighting Systems. This camp is considered one of the most successful in MMA history and has produced several world champions. On July 6, 2014, he was inducted into the UFC Hall of Fame.

source: Quad Cities Silverbacks
text: Quad Cities Silverbacks The Quad Cities Silverbacks are an International Fight League team based in the Quad Cities region of the United States. Coached by former UFC Middleweight and Lightweight Champion and founder of the very successful Miletich Fighting Systems camp, Pat Miletich, the Silverbacks were one of four teams competing in the IFL's inaugural season.

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Answer: wrestling