[4] From 1919 to 1921 the team went back to playing at outdoor rinks after the Boston Arena caught fire in the fall of 1918.

[4] Following three seasons again with no official coach, William H. Claflin became the second coach in program history in 1921[9] On March 7, 1923, William H. Claflin and captain George Owen '23 substituted entire forward lines instead of individuals, in the first recorded use of a line change.

[4][10] On March 12, 1930, Harvard and Yale played the final game of a three-game series to end the 1930 season.

[4] The game was called off at midnight due to blue laws despite the teams being tied in the third overtime and a record crowd in excess of 14,000.

[4] In 1936, the Council of Ivy Group Presidents agreed on the formal formation of the League, however the agreement did not go into effect until the 1955–56 season.

[4] The program was suspended for two years during World War II but then returned to the ice for an abbreviated 1945–46 season.

[4] Weiland guided Harvard to win the inaugural Beanpot hockey tournament on December 27, 1952, when the team defeated Boston University 7–4.

[4] A few seasons later Weiland's Crimson team competed in the 1955 NCAA Ice Hockey Tournament.

[9] In 1956 Harvard moved into the 2,000-seat Donald C. Watson Rink bringing hockey back on campus from the Boston Arena.

[9] Unfortunately, the Crimson would lose in the finals the next day to Boston University and finish fourth in the NCAA Tournament with defeats to Minnesota and the same BU squad.

By the mid-1970s the Donald C. Watson Rink was becoming outdated and the university made plans to construct a new hockey facility.

A decision was eventually made to extensively upgrade the facility and in 1978 the walls were removed and the roof was extended before the new arena was installed at a cost exceeding $5-million.

[17] The Crimson advanced to the Frozen Four in Grand Forks, North Dakota and defeated Minnesota 5–3 to send Harvard to the program's first NCAA Championship appearance.

[17] Despite the loss in the final, Mark Fusco became the school's first Hobey Baker Award winner.

[9] Harvard swept Lake Superior State in the two game quarter-final round by a combined score of 9–4.

[4][18] Following the game, Lane MacDonald became the third player in program history to earn the Hobey Baker Award.

[4] Bill Cleary ended his tenure as head coach at the conclusion of the 1989–90 season to become the director of athletics.

[4] In his 19 seasons as head coach for the program he won 324 games and took the Crimson to the NCAA Tournament nine times, the Frozen Four on seven occasions, and the first national championship for Harvard.

[9] The ECAC regular season championship, the Cleary Cup, is named in honor of the former Harvard player, coach, and Olympian for his efforts to form the conference.

In his first season as head coach on February 1, 1992, Tomassoni guided Harvard to the program's 1,000 win when it defeats Union, 7–3.

[24] In his junior 2018–19 season, he was the top scoring player and defenseman in the country with 1.45 points per game.

[26] Fox also broke the school record for points by a Harvard defenseman in one season, set by Mark Fusco in 1983.

[34] Source:[35] GP = Games played; Min = Minutes played; W = Wins; L = Losses; T = Ties; GA = Goals against; SO = Shutouts; SV% = Save percentage; GAA = Goals against average Minimum 40 games Statistics current through the end of the 2022–23 season.