Adam Blair will hang up the boots after the Warriors' final game against the Sea Eagles.
Tyrone Peachey claims a Knights player called him a "black c**t".
The former Warriors coach is taking up an assistant role at his former club.
The club captain has confirmed his commitment to the NRL club.
The Brisbane Broncos will finish the NRL season in last place.
Stacey Jones and Tony Iro will not be retained in their coaching roles for next season.
Todd Payten feels the Warriors will be better next year after a challenging 2020 campaign.
The NRL club has added Addin Fonua-Blake to an exciting crop of forwards for next season.
Patrick Herbert also returns from injury for the clash with the Sea Eagles on Sunday.