Harrison will announce this afternoon he has recommitted to Canberra for the next three seasons.
The 25-year-old joined the Raiders at the start of 2009.
Before coming to the capital, he was struggling to make it on to the Wests Tigers bench.
He has since transformed into one of the best second-rowers in the NRL and is crucial to Canberra’s hopes of success into the future.
The New Zealand international is the Raiders first major re-signing this season.
Read more at the Canberra Times