Born in Shenstone, a small village in Albert County, New Brunswick, Prosser met 7-year veteran Paul Peller who persuaded him to enter professional wrestling. Training under Emile Dupree in Shediac, he eventually made his debut in 1968 teaming with Peller in Stu Hart's Stampede Wrestling as The Butchers. During their time in the promotion, they proved a popular tag team headlining sold out events in Calgary and Edmonton four weeks straight, which included matches against football player Bob Luce and Emile Dupre.
The following year, he and Peller joined Dupre, Leo Burke and others to tour the Maritimes with Grand Prix Wrestling during the summer before returning to Calgary by the end of the year. Wrestling under the name Freddie Sweetan, Prosser teamed with Stampede Wrestling veteran "Bruiser" Bob Sweetan and eventually won the Stampede Wrestling Tag Team Championship before losing the titles to Bud & Ray Osborne in Calgary, Alberta on April 18, 1969. He and Peller would later win the titles the following year.
In part to an agreement with Sweetan and Leo Burke, Prosser and Sweetan( being the same person) began wrestling in the Kansas City-area as Killer Kox and K.O. Kox with Bob Geigel's NWA Central States. Feuding with Bob Geigel & The Stomper over the NWA Central States North American Tag Team titles, he later faced Geigel in a singles match the following year on November 5, 1970.
While in the United States, he would also team with fellow Canadians The Beast in the Amarillo area and Michel "Le Justice" Dubois in the Mid-Atlantic region who together faced Terry & Bobby Kay, George & Sandy Scott, Big Boy Brown & Klondike Bill, Les Thatcher & Nelson Royal and, most notably The Royal Kangaroos whom they had a five-week feud with in 1973. During their time in the Carolinas, they would also face J.J. Dillon in Greensboro, North Carolina in 1972.
Returning to the Maritimes during the summer months, he also had a successful run with Eric Pomeroy feuding with The Beast, who enlisted Rudy Kay and Leo Burke, fighting over the ESA International Tag Team Championship throughout the early 1970s. He and The Beast would also engage in several single matches as well. He and Pomeroy would win the ESA International Tag Team titles three times before losing the titles to The Beast & Rudy Kay in Halifax, Nova Scotia on October 12, 1971. He would later team with a number of tag team partners including Kurt Von Steiger, Mr. X and J.J. Dillon defeating The Beast & Bobby Kay in September 1973.
Losing single matches to Jacques Rougeau and Johnny Valentine at the Maple Leaf Gardens in February 1974, the titles were later vacated when Dillon did not return to the promotion the following summer. However, he and Michel Dubois would reunite to regain the titles defeating The Beast & Bobby Kay in July 1974.
That same year, while visiting with Prosser and Pomeroy in their motor home, Prosser's father told Pomeroy that he was going to return to his house and commit suicide. After he had left, Pomeroy and Prosser returned to his house to find several Royal Canadian Mounted Police (RCMP) officers were already at the scene where they informed the two Prosser's father had killed himself with a shotgun from the house.
After wrestling his last match in Saint John, New Brunswick, he held a party to celebrate his 36th birthday at his summer cabin at MacFarlane Bridge, 15 miles southeast of Moncton. Although it is unknown what happened during the hours after his friends had left the party, sometime during the night a fire broke out in the cabin resulting in Prosser's death. An investigation by the RCMP concluded that Prosser, whose body had been found near the front door, had been trapped in the cabin during the fire and died of smoke inhalation. The official cause of the fire was stated to have been accidental, and was most likely caused by Prosser having fallen asleep with a lit cigar in his hand.
However, wrestlers such as Emile Dupree have stated they believe the fire may have been started by a charcoal barbecue. Having been known to remain hot after being shut off, the grill may have either caused the fire or might have exploded. This theory was supported by news reports and, according to one news account, officials had "declined to reveal circumstances surrounding the blaze" although an autopsy was performed at a local Moncton hospital.
Pomeroy, who had been unable to attend the party due to a prior commitment in Moncton, was asked by Prosser's mother to take over the funeral service. Prosser would later be cremated and buried alongside his father.Finishing moves
Central States Wrestling
NWA North American Tag Team Championship (Central States version) (2 times) - with Bob Sweetan
Eastern Sports Association
ESA International Tag Team Championship (7 times) - with Eric Pomeroy (2), Michel Dubois (2), Kurt von Steiger (1), Mr. X (1) and James J. Dillon (1)
NWA International Tag Team Championship (Calgary version) (1 time) - with Bob Sweetan