The 24-year-old played 49 games and scored six tries for the Panthers after making his NRL debut in 2015.
“Leilani came to Panthers several years ago looking for an opportunity,” Panthers Executive General Manager Phil Gould AM said.
“Since that time he has worked extremely hard to become a representative class front row forward.
“He has been tremendous for our club and his release from Panthers is purely a salary cap management decision.
“He is a great acquisition for his new club and we wish him well in the future.”