In British rugby league, winning the Treble currently refers to winning the Super League Grand Final, League Leaders' Shield, and Challenge Cup in the same season. Up until 1973 this was achieved by winning the Championship Final, finishing top of the league during the regular season, and winning the Challenge Cup.
Between 1973 and 1996, following the abolition of the Championship Final, the league leaders were declared season champions. In this era, the Premiership was the third trophy required for the treble.
Only six teams have completed the treble, and it has only been achieved three times during the Super League era.[1] Wigan Warriors are the most successful team, winning the treble on 3 occasions.