What number uniform is now worn by the former Canadian professional ice Hockey player?
4
Wes McCauley
Wes McCauley (born January 11, 1972) is a Canadian former professional ice hockey player and current National Hockey League (NHL) referee.
 He is the son of John McCauley, who was also an NHL referee.
Terry Gregson
Terry Gregson (born November 7, 1953) was the National Hockey League Director of Officiating from 2009 through 2013.
 He was formerly a referee in the NHL from 1979 until 2004.
 He wore a helmet from the mid-1980s until the end of his refereeing career.
 From the 1994–95 NHL season until his retirement, he wore uniform number 4, which is now worn by Wes McCauley.
 During his career, he refereed 1,427 regular season games, 158 playoff games, nine Stanley Cup Finals and one All-Star game.
 He also worked the 1996 World Cup of Hockey.
Robert Ouellet
Robert Ouellet (born May 18, 1968) is a former Canadian–French professional ice hockey player who participated in ice hockey at the 1998 Winter Olympics as a member of the France men's national ice hockey team.
 He also competed with France at five Ice Hockey World Championships (1996–2000). Smokey Harris
Thomas Wilfred "Smokey, Fred" Harris (October 11, 1890 – June 4, 1974) was a Canadian professional ice hockey player.
 Harris played in the Pacific Coast Hockey Association (PCHA), the National Hockey League (NHL) and the Western Canada Hockey League (WCHL).
 Harris was born in Port Arthur, Ontario.
 His brother Henry was also a professional ice hockey player.
 Harris scored the first goal in Boston Bruins' franchise history. Bruce Richardson
Bruce Richardson (born June 8, 1977) is a former Canadian professional ice hockey player best known for his time playing for Braehead Clan and the Nottingham Panthers in the British Elite Ice Hockey League and for the Hershey Bears in the American Hockey League.
 Richardson was often a favourite with fans wherever he went, due to his aggressive style of play and determination.
 He was the head coach of the Victoriaville Tigres in the Quebec Major Junior Hockey League from 2014 to 2016. Eric Neilson
Eric Neilson (born August 18, 1984) is a former Canadian professional ice hockey player who was known as an enforcer.
 He last played with the Manchester Storm of the Elite Ice Hockey League (EIHL).
 Neilson was selected by the Los Angeles Kings in the 5th round (143rd overall) of the 2004 NHL Entry Draft. John Van Kessel
John Van Kessel (born December 19, 1969 in Bridgewater, Nova Scotia) is a former Canadian professional ice hockey player.
 Van Kessel played ten professional seasons, in the American Hockey League (AHL), East Coast Hockey League(ECHL) and International Hockey League (IHL) in North America, and in the Deutsche Eishockey Liga (DEL) and Austrian Hockey League (AL) in Europe. Eddie Oatman
Edward Cole "Eddie" Oatman (June 10, 1889 – November 5, 1973) was a Canadian professional ice hockey player.
 He was among the elite goal scorers of his era.
 Among his 32 years (1907–39) playing professional ice hockey, Oatman was named an all-star for ten consecutive seasons by the Pacific Coast Hockey Association (PCHA).
 He was a star with the Quebec Bulldogs when it won the 1912 Stanley Cup.
 Oatman played with clubs that won five league championships, and he was a successful coach and captain of five different hockey teams.
 His brother Russell also played professional ice hockey. Kevin Bolibruck
Kevin Bolibruck (born February 8, 1977 in Peterborough, Ontario) is a former Canadian professional ice hockey player.
 After playing professionally in North America, he moved to Europe in 2003 and latterly was a member of Sport Ghiaccio Pontebba in the Italian Serie A Hockey League and a member of the British Elite Ice Hockey League. Brian Smith (ice hockey, born 1940)
Brian Desmond "Smitty" Smith (September 6, 1940 – August 2, 1995) was a Canadian professional hockey player and sportscaster.
 Smith was born in Ottawa, Ontario, the son of former professional ice hockey player Des Smith and brother of former professional hockey goaltender Gary Smith.
 Smith was a professional ice hockey player from 1960 to 1973, playing in the National Hockey League (NHL) with the Los Angeles Kings and Minnesota North Stars.
 Following his hockey career, Smith was a broadcaster for CJOH-TV in Ottawa until 1995, when he was shot and killed by gunman Jeffrey Arenburg.