THE Broncos have locked up another major talent after exciting second rower Jaydn Su'A signed a new two-year contract with the club.

It continues a huge period of signing news for the Broncos, who also inked deals for Jamayne Isaako and Payne Haas last week.

Su'A was having a breakthrough year in the NRL, starting every week for the Broncos and even being called in to Queensland Origin camp as a development player.

He filled a huge hole in the Broncos' roster after international Matt Gillett sustained a serious neck injury early in the year, and was being chased by several other NRL clubs.

Su'A's year ended with a broken ankle against the Warriors two weeks ago, but the 22-year-old has given the Broncos a huge boost by locking in until the end of the 2020 season.

"I have just signed for two years for the Brisbane Broncos and it is pretty overwhelming," he said.

"I have two big years ahead of me now and I am really excited.

"Overall in the 2018 season I really enjoyed playing each and every week - that was my main goal for this year.

"And although I didn't finish off the season, I will be back."