Following the big win over the Rabbitohs on Friday night, the top spot has been claimed and the Roosters will play their Qualifying Final at Allianz Stadium.
With the second and third positions locked up by the Brisbane Broncos and North Queensland Cowboys, the team that would finish fourth was decided by two games.
The Melbourne Storm defeated the Broncos on Thursday night, locking up the 4th spot after the Cronulla Sharks went down to the Manly Sea Eagles on Sunday afternoon.
The Roosters will now play their Qualifying Final against the 4th placed Melbourne Storm on Friday night at 7.55pm.
With success in both first grade and in the Under 20's competition, the Roosters and the Warriors will go head-to-head in the Holden Cup in an Elmination Final at 5.15pm on the Friday.