Throughout his 20 - yr ice hockey career , Gretzky has used four groups .
Wayne Gretzky is recognized to devote two decades of his vocation , from 1979 to 1999 , as a specialist hockey player for the National Hockey League .
Throughout Wayne Gretzky 's 20 - yr ice hockey career , Wayne Gretzky has used four groups .
Wayne Gretzky is recognized to devote two decades of his vocation , from 1979 to 1999 , as a specialist hockey player for the National Hockey League .