What exactly did KG's alpha dog status in Minnesota do? He had one good year and a whole slew of 1st round exits, not to mention multiple years of missing the playoffs.
And Paul Pierce is the alpha dog on the Celtics, he certainly was in the Finals and to this day that team can't function on offense without him.
Say what you will about Dirk choking in the Finals, but don't ing compare him to Garnett. As an "alpha dog" Dirk has NEVER missed the playoffs and has ALWAYS led his team to 50+ win seasons.