Magic Johnson explains why Warriors aren't greatest team of all-time originally appeared on nbcsportsbayarea.com Programming note: Watch the pregame edition of Warriors Outsiders on Thursday at 6:00pm P.T., streaming live on the MyTeams app. Magic Johnson knows a thing or two about dynasties. Over a span of 12 seasons from 1980 to 1991, his Lakers teams won five championships and lost in the Finals four times.