The Gee-Gees have seen recent graduates sign professional contracts in European leagues and with the ECHL. There are six Gee-Gees players who also played NHL hockey. Five of those players wore the Garnet and Grey between 1920-1936, including two-time Stanley Cup Champion and Ottawa Sports Hall of Fame member Frank Finnigan, and Hockey Hall of Fame Inductee Bill Cowley (jump to NHL list), while multiple alumni have appeared in the AHL including Nicolas Mattinen in 2022. Mattinen signed a one-year, two-way contract with the Toronto Maple Leafs for the 2024-25 season.

Note, players are listed under their first year of playing professionally though many have multiple years as professionals.

2024:

Liam Markhauser (D) - Tulsa Oilers (ECHL)

Justin McRae (F) - Wheeling Nailers (ECHL)

Keenan MacIsaac (D) - Fort Wayne Comets (ECHL)

2022:

Tristan Bérubé (G) - Lions de Trois-Rivières (ECHL)

Nicolas Mattinen (D) - signed with Rocket de Laval (AHL) in 2021-22, appearing in eight games. For the 2022-23 season he played with VSVEC in Austria, recording 42 points in 46 games (12-30) and a plus 37. He moved to Straubing Tigers of Germany's top league, DEL, in 2023-24 and was named the league's Player of the Year with 17 goals and 36 assists in 64 games. In April of 2024 he signed a one-year, two-way contract with the Toronto Maple Leafs for the 2024-25 season. Mattinen was a sixth round pick by Toronto in the 2016 NHL Draft.

2021:

Kevin Domingue (F) - Tulsa Olilers (ECHL), Nottingham Panthers (England, Elite Ice Hockey League), ASC Corona Brasov (Romanian League Champions in 2023)

Jacob Hanlon (F) - Montpellier (France 2)

Cody Drover (F) - Dundee Stars  (Scotland, Elite Ice Hockey League)

2020:

Dominic Cormier (D) - Reading Royals (ECHL)

Médric Mercier (D) - Glasgow Clan (Scotland, Elite Ice Hockey League)

Quinn O'Brien (F) - Glasgow Clan (Scotland, Elite Ice Hockey League)

Jacob Sweeney (D) - Glasgow Clan (Scotland, Elite Ice Hockey League), ASC Corona Brasov (Romanian League Champions in 2023)

Mathieu Newcomb (F) - Huntsville Havoc (USA, SPHL)

Michael Poirier (D) - Dundee Stars (Scotland, Elite Ice Hockey League)

Connor Sills (F) - Dundee Stars (Scotland, Elite Ice Hockey League), ASC Corona Brasov (Romanian League Champions in 2023)

Graham Hunt (G) - Bisons de Neuilly-sur-Marne (France, FFHG Division 1) 

Cody Drover (F) - Scorpions de Mulhouse (France, Ligue Magnus)

Adam Beveridge (D) - Remparts de Tours (France, FFHG Division 1)

Brendan Jacome (F) - Gothiques d'Amiens (France, Ligue Magnus)

Marc Beckstead (F) - Pergine (Italy 2)

2019:

JF Plante (F) - ASC Corona Brasov (Romania) 

Dominic Jalbert (D) - Thetford Assurancia (Quebec, LNAH) - see 2013.

2015:

Luc Olivier Blain (F) - Brampton Beast (ECHL) and St. John's IceCaps (AHL). Blain played three seasons with Brampton and scored 84 points in his ECHL career. He returned to the AHL with Laval Rocket in 2017-18, scoring two goals and two assists in 12 games. Blain signed with Anglet in France for the 2018-19 season, his fourth as a professional player.

2013:

Dominic Jalbert (D) - Reading Royals (ECHL). Jalbert joined the Royals directly following the end of the 2012-13 Gee-Gees season, with 10 games remaining in the ECHL regular season during which he posted a plus seven. Jalbert then helped the Royals capture the ECHL Championship, contributing six points in 15 playoff games. Jalbert continued his pro career with two seasons in Quebec in the LNAH before heading to France for four seasons, topped off with a 34-point season for Anglet in 2018-19. He returned to the LNAH in 2019-20.

2009:

Rob Jarvis (D) - Kalamazoo Wings (IHL). Jarvis scored a career-best 36 points in his first pro season, with 11 goals and 25 assists in 72 games for Kalamazoo, adding a goal and two assists in a short playoff run. Jarvis spent the 2009-10 season in the CHL with the Corpus Christi Icerays before playing two full seasons with Dijon in France.

Danny McDonald (F) - Utah Grizzlies (ECHL). McDonald joined the Grizzlies for the end of the 2008-09 season and scored seven goals and six assists in 16 regular season games.

2003: 

Hugo Giguere (F) - Berlin Capitals (Germany, GerObL). Went on to play two seasons for Riviere-du-Loup in the QSCHL.

Sean Edwards (F) - Kalamazoo Wings (UHL). Later played 7 games in the ECHL in 2004-05, spent three seasons in the SPHL. 

Steve Simoes (F) - Laredo Bucks (CHL). Had a 12-season playing career after university, primarily in the CHL (five seasons) and LNAH (seven seasons), with one year in the UK Elite Hockey League with Nottingham.

Mike Corneau (F) - Port Huron Beacons (UHL). Scored 32 points in 76 games for Port Huron before moving to the CHL for the 2004-05 season.

Wayne Hall (F) - Odessa Jackalopes (CHL). Spent three seasons in the CHL, finishing with Memphis in 2004-05.

Rob Meanchoff (D) - Tulsa Oilers (CHL). After one season with Tulsa, moved to the SPHL for three seasons mostly with the Fayetteville FireAntz. Signed with Nijmegen Devils in Netherlands for his final professional season.

Brock Boucher (F) - Kiekko-Vantaa (Finland)

Sebastien Decaens (F) - Tours (France). Scored 17 goals in 26 games and added nine assists.

2000:

Paolo Della Bella (G) - Magnitogorsk Metallurg (Russia). After playing 16 games in Russia in 2000-01, Della Bella moved to Swiss hockey for two seasons, playing in both the A and B leagues before being signed by the ACHL's Knoxville Ice Bears in 2002-03. In 03-04 Della Bella was back in Europe, but this time in the Italy A league where he spent two seasons with Varesse HC before seven seasons in Milan, completing his lengthy career in 2013-14.

BJ Stephens (F) - Huntsville Tornado (CHL). After starting his pro career in the CHL, Stephens moved to the UHL midway through 2000-01, playing first with the Rockford IceHogs and then with the Mohawk Valley Prowlers. His career spanned until 2007-08 with stops in the WCHL, ACHL, SPHL, and two stints in the ECHL with Reading in 2005-06 and Columbia Inferno in 2007-08.

1999:

Richard Vallee

J.F. Tremblay (D) - Muskegon Fury (UHL). Signed on with Bracknell Bees of the British Superleague in 2000-01, also playing three games in the IHL that season. Tremblay then played three seasons for Pont Rouge of the QSPHL before four seasons in the LNAH. 

Greg Eisler (F) - Colorado Gold Kings (WCHL). Scored 46 points (24-22) for the Gold Kings in 99-00 and returned in 00-01 with 42 points (21-21). Also played 4 games in the IHL with Kansas City in 2000-01.

Sean Hughes (F) - Waco Wizards (WPHL). After 27 games with Waco moved to Central Texas Stampede where he scored 39 points in 41 games. He returned there for the start of the 2000-01 season before moving again to Amarillo, all within the WPHL. Hughes then played the 2001-02 and 2002-03 seasons with Fort Worth of the CHL.

Mike Coveny (D) - Amarillo Rattlers (WPHL). Also signed with the Akansas RiverBlades (ECHL) in 1999-00, then a member of two UHL teams in 2000-01 before finishing his career in 2001-02 with Laval of the QSPHL.

1998:

Chris Coveny (D) - Peoria Rivermen (ECHL). Notched 23 points in 58 games for the Rivermen, then signed in Russia for the 1999-2000 season. After two seasons in the Russian Elite League, he played his final season with Saguenay of the QSPHL.

Rob Murdoch (G) - Jacksonville Lizard Kings (ECHL). Played 21 career games in the ECHL over three teams and two seasons. Also a member of the UHL's Missouri River Otters and the Tulsa Oilers of the CHL.

1996:

J.F. Rivard (G) - Thunder Bay ThunderCats (UHL). Had a seven-season career in the UHL, spending three years with Thunder Bay before finishing his career with the Rockford Icehogs, recording a career-best .914 save percentage in 2000-01 with Rockford.

David Andre (F) - Thunder Bay ThunderCats (UHL). Scored 14 goals and ten assists in 39 games for Thunder Bay in 1996-97.

1995:

Carl Menard (F) - Memphis RiverKings (CHL). Two successful seasons with Memphis was the start of a 12-season career spanning the CHL, WCHL, WPHL, QSPHL and LNAH. In his first pro season Menard scored 40 goals in 60 games, with 62 total points. He completed his career in 2006-07.

Martin Roy (D) - Richmond Renegades (ECHL). Played 82 games over two seasons with Richmond, as well as 22 games in the IHL with the Manitoba Moose in 1996-97.

1994:

Joey St. Aubin (F) - Cornwall Aces (AHL). Appeared in five games for Cornwall in 1993-94.

Luc Tremblay L’Equipe des Trois Vallee France

1992:

Steve Simoni (F) - Oklahoma City Blazers (CHL). Spent a total of six seasons with Oklahoma City, with an 18-game stint in the IHL with Houston in 1996-97 and 40 games spent with Bremerhaven in Germany in 1997-98, where he scored 41 points.

1990:

Jeff Stanton (D) - Brantford Smoke (CoHL). Also played for the Nijmegen Tigers in Holland.

Gee-Gees in the NHL:

Frank Finnigan

From Shawville, Finnigan played for the University of Ottawa team in the Ottawa City Hockey League in 1921-22 and 1922-23 although he was not a student and did not graduate from the institution. In 14 total games in Garnet and Grey Finnigan scored eight goals and eight assists. He joined the Ottawa Senators for two games in 1923-24 but was a regular fixture from 1924 until 1930-31, including winning the Stanley Cup in 1927. The 1931-32 season saw him in Toronto blue and white, and he won his second Stanley Cup that season before he returned to the Senators for 1932-33 and 1933-34.

When the Senators were re-located to St. Louis in 1934-35, Finnigan followed before finishing his career in Toronto. A defensive minded right-winger, Finnigan played in the first NHL All-Star game in 1934. All together, he spent parts of ten seasons with the Senators and four with Toronto, scoring 115 career goals and 88 assists in 555 regular season games. Finnigan became a corporal in the RCAF and played and coached with RCAF hockey teams in Ottawa and Toronto following his NHL career, also coaching the Montagnards of Ottawa's Senior City Hockey League during the Second World War.

Finnigan was inducted into the Ottawa Sports Hall of Fame in 1992 and also had his jersey number, 8, retired by the Ottawa Senators. At the end of his life he was the oldest living NHL player and was actively helping to bring the Senators NHL team back to Ottawa. He died at the age of 91 in December, 1991.

Gerry Lowrey

From Ottawa, Gerry Lowrey wore the Garnet and Grey in 1921-22 in the Ottawa City Hockey League. He went on to have a six-year career in the NHL, making his debut with Toronto in 1927. He also played for the Pittsburgh Pirates, Philadelphia Quakers, Chicago Blackhawks, and the Ottawa Senators were his final NHL stop in 1932-33.

Rolly Huard

From Ottawa, Rolly Huard was a Gee-Gee in the 1921-22 season in the Ottawa City Hockey League. Although his hockey career was long, his NHL career was short and sweet. He scored a goal in his only NHL game, which came in 1930 with the Toronto Maple Leafs. He was the first player to score a goal in his only NHL game, and as of 2020 there have been only four.

Bill Cowley

Bill Cowley skated for the University of Ottawa in 1932-33, notably scoring five goals in one game against RMC, and a hat-trick against Queen's. He was well-known in Ottawa for his play with the Shamrocks of the city league, and began an extremely successful 13-season long NHL career with St. Louis in 1934-35. He played 12 of those seasons with the Boston Bruins and won two Stanley Cups.

Cowley was a five-time NHL All-Star and led the league in scoring in 1940-41 with 62 points (17-45) in 46 games. He was awarded the Hart Trophy as League MVP that season. His career high of 72 points (27-45) came in 1942-43 and won his second Hart Trophy. He was on pace to set a league scoring record before an injury shortened his 1943-44 season. Still, his mark of 71 points in 36 games (1.97 points per game) has been topped by only two players since: Wayne Gretzky and Mario Lemieux. 

Cowley retired after the 1946-47 season. His career totals are 594 regular season games with 195 goals and 353 assists (548 total points), with an additional 64 games, 12 goals, and 34 assists in the playoffs. He returned to Ottawa and coached in the Ottawa senior leagues, as well as with the Vancouver Canucks of the PCHL. He later owned the Elmdale Tavern and in 1967, he was a part-owner and founder of the Ottawa 67s. He was inducted into the Hockey Hall of Fame in 1968, and died in 1993.

Ken Kilrea

Ken Kilrea represented the University of Ottawa in Junior City League play in 1935-36, helping the Garnet and Grey to a ten-game unbeaten streak. He was the league's leading scorer with 18 goals and 7 assists. He began his NHL career in 1938-39 and spent five seasons with the Detroit Redwings for a total of 91 games played. He notched 16 goals and 24 assists for Detroit, including a ten-goal season in 1939-40.

Pierre Gagne

Gagne came to uOttawa after playing in the NHL. He appeared in two games for the Boston Bruins in 1959-60 as a 19-year-old and then played in the EHL and IHL before becoming a student at uOttawa in 1962. He played for the Gee-Gees in 1962-63 and 1963-64, contributing to the strong scoring forward lines. He then returned to the pros playing EHL and AHL hockey until 1970. He spent three full seasons (1966-67, 67-68, 68-69) with the AHL's Providence Reds, scoring 20 goals in his first campaign. Providence was the AHL affiliate of the NHL's St. Louis Blues in 1968-69. He finished his pro career in 1969-70 with Nashville in the EHL. His son, Simon, was an NHL player from 1999-2015.

Jacques Martin

Martin was a goaltender on the Gee-Gees 1975-76 team and began his coaching career shortly after that. His long NHL coaching career began in 1986 when he was named head coach of the St. Louis Blues. He was head coach of the Ottawa Senators for ten seasons and also headed the Florida Panthers and Montreal Canadiens. In total, he was head coach for 1,350 NHL regular season games (which ranks 16th in league history), with a record of 639-507-119-84. His eighteen NHL seasons included twelve playoff appearances, with a 50-61 record over his 111 playoff games as head coach. He won the Stanley Cup as a member of the Pittsburgh Penguins coaching staff in both 2016 and 2017, and was the NHL Coach of the Year in 1998-99.