The 1990 Calder Cup Playoffs of the American Hockey League began on April 4, 1990. The eight teams that qualified, four from each division, played best-of-7 series for Division Semifinals and Division Finals. The division champions played a best-of-7 series for the Calder Cup. The Calder Cup Final ended on May 18, 1990 with the Springfield Indians defeating the Rochester Americans four games to two to win the Calder Cup for the sixth time in team history. Despite an injury preventing him from playing in the final game, Springfield goaltender Jeff Hackett won the Jack A. Butterfield Trophy as the MVP of the playoffs.
After the 1989-90 AHL regular season, the top four teams from each division qualified for the playoffs. The Sherbrooke Canadiens finished the regular season with the best overall record for the second straight season.
In each round, the team that earned more points during the regular season receives home ice advantage, meaning they receive the "extra" game on home-ice if the series reaches the maximum number of games. There is no set series format due to arena scheduling conflicts and travel considerations.
Division Semifinals[]
Note: Home team is listed first.
Northern Division[]
(1) Sherbrooke Canadiens vs. (4) Halifax Citadels[]
April 4
Sherbrooke Canadiens
2 - 4
Halifax Citadels
April 6
Sherbrooke Canadiens
7 - 4
Halifax Citadels
April 9
Halifax Citadels
7 - 4
Sherbrooke Canadiens
April 10
Halifax Citadels
3 - 8
Sherbrooke Canadiens
April 12
Sherbrooke Canadiens
4 - 3
OT
Halifax Citadels
April 14
Halifax Citadels
2 - 6
Sherbrooke Canadiens
Sherbrooke won series 4 – 2
(2) Cape Breton Oilers vs. (3) Springfield Indians[]
April 5
Cape Breton Oilers
4 - 3
Springfield Indians
April 7
Cape Breton Oilers
2 - 3
OT
Springfield Indians
April 10
Springfield Indians
8 - 3
Cape Breton Oilers
April 12
Springfield Indians
5 - 4
OT
Cape Breton Oilers
April 14
Cape Breton Oilers
8 - 7
OT
Springfield Indians
April 17
Springfield Indians
5 - 3
Cape Breton Oilers
Springfield won series 4 - 2
Southern Division[]
(1) Rochester Americans vs. (4) Utica Devils[]
April 5
Rochester Americans
5 - 4
Utica Devils
April 7
Utica Devils
1 - 3
Rochester Americans
April 8
Rochester Americans
3 - 1
Utica Devils
April 11
Utica Devils
7 - 3
Rochester Americans
April 13
Rochester Americans
6 - 2
Utica Devils
Rochester won series 4 - 1
(2) Adirondack Red Wings vs. (3) Baltimore Skipjacks[]
April 6
Adirondack Red Wings
2 - 1
Baltimore Skipjacks
April 7
Adirondack Red Wings
3 - 8
Baltimore Skipjacks
April 9
Baltimore Skipjacks
5 - 1
Adirondack Red Wings
April 10
Baltimore Skipjacks
4 - 5
OT
Adirondack Red Wings
April 13
Adirondack Red Wings
3 - 6
Baltimore Skipjacks
April 14
Baltimore Skipjacks
5 - 3
Adirondack Red Wings
Baltimore won series 4 - 2
Division Finals[]
Northern Division[]
(1) Sherbrooke Canadiens vs. (3) Springfield Indians[]
April 20
Sherbrooke Canadiens
3 - 4
Springfield Indians
April 22
Sherbrooke Canadiens
7 - 4
Springfield Indians
April 25
Springfield Indians
3 - 2
Sherbrooke Canadiens
April 28
Springfield Indians
5 - 2
Sherbrooke Canadiens
April 29
Sherbrooke Canadiens
7 - 4
Springfield Indians
May 1
Springfield Indians
5 - 4
OT
Sherbrooke Canadiens
Springfield won series 4 - 2
Southern Division[]
(1) Rochester Americans vs. (3) Baltimore Skipjacks[]
April 17
Rochester Americans
6 - 4
Baltimore Skipjacks
April 20
Rochester Americans
4 - 1
Baltimore Skipjacks
April 21
Baltimore Skipjacks
2 - 0
Rochester Americans
April 23
Baltimore Skipjacks
3 - 1
Rochester Americans
April 25
Rochester Americans
5 - 4
OT
Baltimore Skipjacks
April 28
Baltimore Skipjacks
5 - 8
Rochester Americans
Rochester won series 4 - 2
Calder Cup Final[]
(S1) Rochester Americans vs. (N3) Springfield Indians[]