The 2020–21 Niagara Purple Eagles men's ice hockey season was the 25th season of play for the program, the 23rd at the Division I level, and the 11th season in the Atlantic Hockey conference. The Purple Eagles represented Niagara University and were coached by Jason Lammers, in his 4th season.

As a result of the ongoing COVID-19 pandemic the entire college ice hockey season was delayed. Because the NCAA had previously announced that all winter sports athletes would retain whatever eligibility they possessed through at least the following year, none of Niagara's players would lose a season of play.^[1] However, the NCAA also approved a change in its transfer regulations that would allow players to transfer and play immediately rather than having to sit out a season, as the rules previously required.^[2]

Niagara had a difficult start to their season, with the team's defense unable to withstand sustained pressure for most of their games. By mid-January the team was near the bottom of the conference with just 2 wins in 13 games. To make matters worse, the Purple Eagles weren't able to play any games for 6 weeks due to COVID cancellations. When they finally managed to play again they decided to use Chad Veltri as their starting goaltender. In the final two weekends of the regular season the choice appeared to work out as Niagara split both weekends while Veltri recorded the only shutout for the Purple Eagles on the campaign.

Niagara entered the postseason as the 9th seed and needed to beat Mercyhurst to keep their season alive. After the Lakers scored the first two goals of the game it looked like NU would have an early summer but Veltri withstood a barrage of shots from Mercyhurst over the final 38 minutes and allowed Niagara to crawl its way back and win on a late marker from junior transfer Walker Sommer. In the quarterfinals, the Purple Eagles had to face Robert Morris, a team that had won all four meetings to that point. The Colonials won the first game but they needed overtime to do so. In keeping the game close, Veltri game his team an opportunity to win and the sophomore netminder remained hot in game 2 as well; Veltri faced 51 shots over an 80-minute span and the frantic pace appeared to wear on Robert Morris who weren't able to get a single shot on goal in over 7 minutes of play in the second overtime. Instead, it was Niagara who fired 5 shots on goal with the last tying the series at 1-all. Veltri was again front and center for the team in the deciding game, facing 45 shots in regulation. Niagara built a 2-goal lead and held it until just 12 seconds remained in the game, when RMU scored their only goal on the night, allowing Niagara to pull off a huge upset in the conference tournament.

In the semifinals, Niagara had to get past league-leading American International, who had not played a game since the end of January due to their own series of cancellations. Veltri continued to keep the Purple Eagles in contention, stopping everything in the first two periods and giving the team a lead entering the third, but AIC's slumbering offense awoke in the final frame, scored two goals, and ended Niagara's improbable run.

Trevor Poeze and Patrick Pugliese sat out the season.

As of October 14, 2020.^[3]

More information No., S/P/C ...

No.	S/P/C	Player	Class	Pos	Height	Weight	DoB	Hometown	Previous team	NHL rights
1		Patrick Pugliese	Freshman	G	6' 0" (1.83 m)	180 lb (82 kg)	1999-07-20	Pasadena, California	New Jersey (NAHL)	—
2		Jesse Pomeroy	Freshman	D	6' 2" (1.88 m)	190 lb (86 kg)	1999-05-25	Prince George, British Columbia	Drayton Valley (AJHL)	—
3		Reed Robinson	Junior	F	6' 2" (1.88 m)	205 lb (93 kg)	1998-03-11	Rockwall, Texas	Wilkes-Barre/Scranton (NAHL)	—
4		Chris Harpur (C)	Senior	D	6' 3" (1.91 m)	200 lb (91 kg)	1996-09-13	Niagara-on-the-Lake, Ontario	Cowichan Valley (BCHL)	—
5		Croix Evingson	Junior (RS)	D	6' 5" (1.96 m)	230 lb (104 kg)	1997-08-28	Anchorage, Alaska	UMass Lowell (HEA)	TBL, 211st overall 2017
7		Jordan Wishman	Junior	D	6' 1" (1.85 m)	187 lb (85 kg)	1998-11-22	Des Moines, Iowa	Dubuque (USHL)	—
8		Walker Sommer	Junior (RS)	F	5' 9" (1.75 m)	175 lb (79 kg)	1996-04-29	Avon, Ohio	Air Force (AHA)	—
9		Eric Cooley	Senior	F	5' 9" (1.75 m)	175 lb (79 kg)	1998-05-05	Pittsburgh, Pennsylvania	Amarillo Bulls (NAHL)	—
10		Carter Randklev	Freshman	F	5' 8" (1.73 m)	163 lb (74 kg)	1999-11-05	Moorhead, Minnesota	Fargo (USHL)	—
11		Scott Persson	Sophomore	D	5' 10" (1.78 m)	180 lb (82 kg)	2000-08-17	Kristianstad, Sweden	Lone Star (NAHL)	—
12		Jason Pineo	Sophomore	F	6' 2" (1.88 m)	200 lb (91 kg)	1998-02-23	Toronto, Ontario	Oakville (OJHL)	—
13		Zac Herrmann	Junior	D	6' 0" (1.83 m)	185 lb (84 kg)	1997-11-06	Lancaster, New York	Odessa (NAHL)	—
14		Ryan Naumovski	Sophomore	F	6' 0" (1.83 m)	150 lb (68 kg)	1999-07-28	Shelby Township, Michigan	New Jersey (NAHL)	—
15		Matt Cameron	Freshman	F	5' 11" (1.8 m)	185 lb (84 kg)	2000-06-08	Berwyn, Pennsylvania	New Jersey (NAHL)	—
16		Jared Brandt	Senior (RS)	D	6' 0" (1.83 m)	195 lb (88 kg)	1995-10-26	St. Louis, Missouri	Miami (NCHC)	—
17		Luke Edgerton	Junior	F	5' 10" (1.78 m)	180 lb (82 kg)	1997-05-01	Wheeling, West Virginia	Jersey (NCDC)	—
18		Dylan Mills	Junior	F	6' 3" (1.91 m)	205 lb (93 kg)	1999-08-18	Cottage Grove, Minnesota	Sioux City (USHL)	—
19		Ryan Cox	Junior	F	5' 11" (1.8 m)	195 lb (88 kg)	1998-07-23	St. Albert, Alberta	Sherwood Park (AJHL)	—
20		Christian Gorsack	Freshman	F	5' 11" (1.8 m)	183 lb (83 kg)	2000-06-08	Jeannette, Pennsylvania	Johnstown (NAHL)	—
21		Justin Kendall	Senior	F	6' 0" (1.83 m)	180 lb (82 kg)	1998-05-07	Holmen, Wisconsin	Coulee Region (NAHL)	—
22		Alex Truscott	Junior	F	5' 8" (1.73 m)	170 lb (77 kg)	1998-03-23	Draper, Utah	Minnesota Wilderness (NAHL)	—
23		Cam Cook	Junior	F	5' 11" (1.8 m)	188 lb (85 kg)	1997-11-13	Halifax, Nova Scotia	Shreveport (NAHL)	—
24		Josef Myšák	Freshman	D	6' 3" (1.91 m)	215 lb (98 kg)	1999-09-08	Litvínov, Czech Republic	Austin (NAHL)	—
25		Jon Hill	Junior	D	6' 2" (1.88 m)	200 lb (91 kg)	1998-10-09	Whitby, Ontario	Brockville (CCHL)	—
26		Brandon Stanley	Junior	F	6' 2" (1.88 m)	202 lb (92 kg)	1997-05-03	Sioux Lookout, Ontario	Philadelphia (NAHL)	—
27		Jack Billings	Senior (RS)	F	5' 9" (1.75 m)	190 lb (86 kg)	1995-10-04	Oak Lawn, Illinois	Salve Regina (CCC)	—
28		Jack Zielinski	Senior	D	6' 2" (1.88 m)	205 lb (93 kg)	1996-08-08	Richmond, Virginia	Lone Star (NAHL)	—
29		Ludwig Stenlund	Junior	F	6' 3" (1.91 m)	190 lb (86 kg)	1997-04-16	Skellefteå, Sweden	Madison (USHL)	—
31		Chad Veltri	Sophomore	G	5' 11" (1.8 m)	187 lb (85 kg)	1998-06-03	Pittsburgh, Pennsylvania	Youngstown (USHL)	—
33		Brian Wilson	Senior	G	6' 4" (1.93 m)	185 lb (84 kg)	1996-09-27	Pickering, Ontario	Powell River (BCHL)	—
35		Mike Corson	Junior	G	6' 3" (1.91 m)	195 lb (88 kg)	1999-04-22	Darien, Illinois	Denver (NCHC)	—
37		Trevor Poeze	Freshman	F	5' 10" (1.78 m)	180 lb (82 kg)	1999-07-17	Mississauga, Ontario	Kanata (CCHL)	—

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USCHO did not release a poll in week 20.^[6]