Franklin Patrick Spring (born October 19, 1949 in Rossland, British Columbia and raised in Cranbrook, British Columbia) is a retired professional ice hockey player who played 61 games in the National Hockey League and 13 games in the World Hockey Association.
 He played with the St. Louis Blues, Boston Bruins, California Golden Seals, Cleveland Barons, and Indianapolis Racers.
Barry Michael Boughner (born January 29, 1948 in Delhi, Ontario) is a Canadian former professional ice hockey left winger.
 He played 20 National Hockey League games with the Oakland Seals/California Golden Seals, going scoreless with 11 penalty minutes.
This is a list of coaches of the California Seals, Oakland Seals and California Golden Seals.
 Eight men coached the Seals from their creation for the 1967–68 NHL season until the team moved to Cleveland, Ohio after the 1975–76 NHL season.
 Fred Glover had two stints as coach of the Seals.
 Bert Olmstead is the only Seals coach inducted in the Hockey Hall of Fame.
The California Golden Seals were a team in the National Hockey League (NHL) from 1967 to 1976.
 Initially named California Seals, the team was renamed Oakland Seals partway through the 1967–68 season (on December 8, 1967), and then to California Golden Seals in 1970.
 The Seals were one of six teams added to the league as part of the 1967 NHL expansion.
 Based in Oakland, California, they played their home games at the Oakland–Alameda County Coliseum Arena.
 However, the Seals were never successful at the gate, and eventually moved to Cleveland to become the Cleveland Barons in 1976.
The Columbus Golden Seals were a minor league professional ice hockey team in the International Hockey League from 1971 to 1973.
 Columbus operated as a farm team to the National Hockey League's California Golden Seals.
 The owner of the NHL Seals, Charlie Finley, had acquired the IHL franchise rights to the dormant Columbus Checkers to create the farm team.
 In 1973, Finley sold the Columbus Golden Seals.
 The new owner, Al Savill, renamed the team the Columbus Owls for the 1973–74 season.
John Wayne Muloin (born December 24, 1941 in Dryden, Ontario) is a retired professional ice hockey player who played 258 games in the World Hockey Association and 141 games in the National Hockey League.
 Throughout his career he played for the: Detroit Red Wings, California Golden Seals, Minnesota North Stars, Cleveland Crusaders, Edmonton Oilers, Edmonton Flyers, Cincinnati Wings, St. Paul Rangers, Providence Reds, Vancouver Canucks, Oakland Seals, Cleveland Barons, Syracuse Blazers and Rhode Island Reds.
The 1972–73 California Golden Seals season was the California Golden Seals' sixth season in the NHL.
 The Seals were hit particularly hard by defections to the new World Hockey Association, dropping 12 points from the previous year and returning to the basement of the West Division.
 The Seals had the worst record in the National Hockey League with a 13–55–10 record.
The 1970–71 California Golden Seals season was the Seals' fourth in the NHL, but their first as the "Golden Seals".
 Oakland Athletics owner Charlie O. Finley bought the team in the offseason for approximately $4,500,000.
 He announced that the name of the team was being changed to Bay Area Seals, but two games into the season changed it again to California Golden Seals, in an attempt to draw fans from across the state of California, in particular from nearby San Francisco.
 Along with the name change came new green and gold colours, and a new logo and uniforms.
Michael Frederick Laughton (born February 21, 1944) is a retired professional ice hockey player who played 189 games in the National Hockey League and 203 games in the World Hockey Association.
 He played for the California Golden Seals, New York Raiders, New York Golden Blades, New Jersey Knights, and San Diego Mariners.
He was sold to the Montreal Canadiens before the start of the 1971-72 season by the California Golden Seals.
 Not being able to make the team with an already stacked lineup, Laughton was sent down to the Nova Scotia Voyageurs of the American Hockey League and made team captain by head coach Al MacNeil.
 He led the team that included Larry Robinson and Yvon Lambert, future stars on the Canadiens, to the Calder Cup championship in 1972.
The 1967–68 Oakland Seals season was their first season in the NHL.
 It began auspiciously, with the firing General Manager Rudy Pilous before the expansion draft.
 The Seals started their inaugural season with Hall of Famer Bert Olmstead as both coach and general manager, assisted by Gordie Fashoway.
 The team began the season as the California Seals, but the name was changed to Oakland Seals only a month into the season.

Question: In which sport was Franklin Patrick Spring, from British Columbia, and former player of a team known as the California Seals, the Oakland Seals and finally the California Golden Seals, a professional?
Answer: ice hockey