The 1991 Stanley Cup playoffs for the National Hockey League (NHL) championship began on April 3, 1991, following the 1990–91 regular season. The 16 teams that qualified, from the top four teams of the four divisions, played best-of-seven series with re-seeding after the division finals. The Conference Champions played a best-of-seven series for the Stanley Cup.

Mario Lemieux is a Canadian former professional ice hockey player. He played parts of 17 seasons in the National Hockey League (NHL) for the Pittsburgh Penguins between 1984 and 2005, and he assumed ownership of the franchise in 1999. Nicknamed "The Magnificent One", "Le Magnifique", and "Super Mario", his combination of size, strength, athleticism, and creativity made him one of the greatest players of all time.