Tuivasa-Sheck polled 29 votes to win the league's player-of-the-season award by two points from Newcastle's Kalyn Ponga, with Cronulla's Valentine Holmes in third.
In a sign of the changing times, none of the top five - which also included Luke Brooks and Mitchell Pearce - have previously polled in the top five positions at the Dally Ms during their career.
The Warriors fullback trailed by one vote with a round to go, but polled three points in the final round against Canberra while Ponga remained on the sideline injured.
