The knee injury was suffered during the game against Hunslet.
Broncos coach Andrew Henderson is disappointed to lose the player’s services.
“Daniel has been an ever-present for us this season and he’s been a bit of an unsung hero on the pitch,” he said.
“I’ve been very impressed by Harrison’s work for us this year.
“Fortunately we can rotate some players in the forwards into that position and we have some cover with Glenn Riley successfully making his comeback on dual registration at London Skolars over the weekend.”