Warriors front rower James Gavet has extended his contract to the end of 2019 while New Zealander Leivaha Pulu will move to Mount Smart Stadium from the Gold Coast Titans on a three-year contract next season.
Both aged 27, the two big forwards have also been late developers at first-grade level.
Gavet has played 18 of his 32 career games with the Warriors since the start of 2016 and Pulu started his 34-game NRL career in round one last year.
"They both bring size and plenty of enthusiasm and aggression in the way they play the game," said Warriors recruitment and development manager Tony Iro.
"James was in our NYC and NRL squads in 2009 and 2010 and always had potential. It has taken him time to get to this level but he has had a really impressive season since coming back into our first-grade side in round four.
"We’ve been interested in Leivaha for a while. He has worked hard for his opportunity in the NRL and has made a real impact since joining the Titans."
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