Final answer:
Every team in the NHL has retired the number 99 to honor Wayne Gretzky's exceptional contributions to the sport of ice hockey. Known as "The Great One," Gretzky holds multiple scoring records and changed the way hockey is played. His number was retired league-wide following his retirement in 1999.
Step-by-step explanation:
The National Hockey League (NHL) has retired the number 99 in honor of Wayne Gretzky. This tribute is in recognition of Gretzky's phenomenal achievements and his legendary status in the world of ice hockey. Gretzky is often referred to as "The Great One," and his career was so prolific that the NHL made the unprecedented decision to retire his number league-wide. This means that no player in any NHL team could wear the number 99 again, a gesture that cements Gretzky's unparalleled contribution to the sport.
Wayne Gretzky set numerous scoring records in his career, including the most career points, goals, and assists. His ability to read the game and his exceptional skills on the ice revolutionized how the sport was played and perceived. The decision to retire number 99 across all teams was made immediately after Gretzky retired in 1999. This honor reflects Wayne Gretzky's impact on the game and his role as an ambassador for the sport.