The UNB REDS compete in a variety of sports, including men's and women's basketball, ice hockey, soccer, and volleyball.

Additionally, the athletic program encompasses swimming, track and field, cross country running, and curling for both men and women.

[3] Then known as the Red Devils, the team made their first appearance in the national tournament in 1964 where they lost to the Alberta Golden Bears, but defeated the Montreal Carabins to win a bronze medal.

[4] The REDS men's hockey team has appeared in 15 gold medal games and has won ten national championships, most recently in 2024.

[10] In their history, the Red Bombers won two Jewett Trophy conference championships in 1969 and 1970, but lost in the following Atlantic Bowls to the McGill Redmen and Ottawa Gee-Gees respectively.

In 2009 (the inaugural season for the Atlantic Football League), the Red Bombers defeated the UNB Saint John Seawolves to capture the first Moosehead Cup championship.

After a five-year absence, the Red Bombers qualified for the 2017 championship game where they defeated the Dalhousie Tigers 39–35 in the highest scoring Moosehead Cup to date.

[11] The UNB wrestling team is known as the Black Bears, and they have produced several CIAU/CIS medals, as well as a record 15 consecutive AUAA titles from 1987 to 2002.

The UNB men's rugby team is known as the Ironmen, and they boast numerous New Brunswick and Maritime championships at the 'A' and 'B' levels of competition.