The original host team, the Beauport Harfangs, dropped out after finishing 26-40-4 in the 1990–91 QMJHL season and failing to qualify for the playoffs.
Spokane, led by the high-scoring duo of Pat Falloon and Ray Whitney, dominated the tournament and won their first Memorial Cup, defeating Drummondville 5-1 in the final game.
The team allowed the fewest goals in the QMJHL at 223, winning the Robert Lebel Trophy.
Stephane Charbonneau led the Saguenéens in goals with 37, finishing with a total of 67 points in 55 games after being acquired in an early season trade with the Shawinigan Cataractes.
Steve Larouche scored 35 goals and 76 points in only 48 games with the club due to injuries.
In the playoffs, Potvin had a record of 11-4 with a 2.78 GAA and a .901 save percentage, winning the Guy Lafleur Trophy for most valuable player in the post-season.
The Drummondville Voltigeurs finished the 1990–91 season in third place in the Dilio Division with a record of 42-25-3, earning 87 points.
In the post-season, the Voltigeurs upset the Trois-Rivières Draveurs in the QMJHL quarter-finals with a four game to two series victory.
In the QMJHL semi-finals, Drummondville defeated the Longueuil Collège Français, the top team from the Lebel Division, in a four game sweep.
This ensured the Voltigeurs a berth at the 1991 Memorial Cup, as the host team, the Beauport Harfangs dropped out of the tournament after they failed to qualify for the playoffs.
Drummondville was led offensively by Denis Chasse, who finished fifth in league scoring with 47 goals and 101 points in 62 games.
Seventeen year old Yanick Dupre scored 29 goals and 67 points in 58 games, while another seventeen year old, Rene Corbet, scored 25 goals and 65 points in 45 games, helping both players get selected at the 1991 NHL Entry Draft.
Defenseman Patrice Brisebois, acquired by the Voltigeurs prior to the season from the Laval Titan, scored 17 goals and 61 points in 54 games with Drummondville.
Marie swept the Niagara Falls Thunder in four games and a berth in the J. Ross Robertson Cup finals.
The Chiefs shocked the Blazers, sweeping the series fives games to zero, earning a berth in the President's Cup finals.
In the final round, the Chiefs swept the Lethbridge Hurricanes four games to none to earn a berth in the 1991 Memorial Cup.
Round-robin Semi-final Final Goaltenders Defencemen Wingers Centres [2] All-star team