Jason Seguine

is an American professional wrestler and former football player, known by his ringname Buck Quartermain, who competes in Southeastern regional promotions including Independent Pro Wrestling and the National Wrestling Alliance-affiliated NWA Florida. He had also had brief stints in the World Wrestling Council, World Wrestling Entertainment and Total Nonstop Action Wrestling as the tag team partner of Lex Lovett during the early 2000s.

As of 2007, Quartermain began negotiating to appear on WWE's Extreme Championship Wrestling brand as well as touring Japan with Osamu Nishimura's Muga World promotion. He is also a current instructor at Steve Keirn's Pro Wrestling School of Hard Knocks. In 2004, Quartermain began wrestling for Total Nonstop Action Wrestling losing and, while initially a preliminary wrestler during his first few months with the promotion, he eventually formed a successful tag team with Lex Lovett and manager Johnny Fairplay (substituting for an injured Roderick Strong, the two would face each other in a match for the NWA Southern Heavyweight Championship at NWA Florida's supercard Rage in the Cage 7 on February 26, 2005).After losing to The Naturals at Destination X 2005 on March 13,however, the tag team would eventually be phased out from TNA PPV events during the next year and, after Lovett's retirement in June 2005, Seguine returned to the independent circuit defeating Bruce Steele, Steve Madison and Roderick Strong to win Elite Wrestling Entertainment's Florida's Strongest Tournament on July 22, 2005. Teaming with Roderick Strong only one week later, they fought to a double disqualification against Steve Madison and Chris Kanyon on July 30, 2005.

The following month, with Lovett in his corner, Quartermain defeated Glacier at a Coastal Championship Wrestling event becoming the number one contender for the CCW heavyweight title on August 13 and defeated Steve Madison, Chris Kanyon and Erick Stevens for EWE in a no disqualification match with The Market Crashers on August 19, 2005.

He also made a one-time appearance on Monday Night Raw as Buck Quartermaine teaming with Steve Madison to lose to The Big Show in a handicap match in Tampa on August 29, 2005. He would also appear on SmackDown in a tag team match with Antonio Banks against The Shane Twins in a dark match on September 1. He and Steve Madison would also make in appearance at the debut show of the Japan promotion Big Mouth Loud facing Riki Choshu and Takashi Uwano at Korakuen uit

Throughout 2006 and into 2007, Segunie would continue wrestling in independent promotions. Although defeating the tag team Black Market in a handicap match four days later while in Elite Wrestling Entertainment, he and Lovett lost to Tom Lawlor and J.P. Ice at a Pro Wrestling Warfare on March 11. He also lost to “Classy” Chris Nelson on April 1 and, with The Sandman, lost to Black Market in a tables match on April 28.

Losing to Scott Davis in a 3-way match with Steve Madison at a Pro Wrestling World 1 event on July 1, he defeated Octavio Olivieri on August 31 in Elite Wrestling Entertainment and "The Marquee" Bruce Santee in AWA World 1 South on January 14, 2007.