Air has agreed a two-year contract and is the Broncos' ninth close-season signing - all from Down Under - as the Broncos coach, Tony Currie, rings the changes in a bid to improve on last season's runners-up position, their best-ever finish in the league.
Hull Sharks completed a club record pounds 350,000 triple transfer deal yesterday when the England international full-back Steve Prescott joined the Super League newcomers.
Prescott agreed a two-year deal and links up with two more former Saints - the Great Britain winger lan Hunte and back row forward Simon Booth.
The Sharks agreed a pounds 350,000 fee for the trio a month ago but, while Hunte and Booth signed, Prescott wanted time to think things over.
Halifax have signed Australian pair, Damian Gibson and Des Clark, on 12-month contracts. Gibson, a pacy full-back, was released by Leeds. Clark, 25, is a prop or second row who played this year for Gold Coast.
The pair are expected to join fellow countryman Gavin Clinch at Halifax in mid-January when their work permits are processed. Scrum-half Clinch was signed from St George.
Back row Simon Baldwin has rejected an offer to play rugby union for Sale after agreeing a new deal with the Blue Sox.
Castleford have completed the signing of New Zealander Michael Smith on a one-year contract and have received a work permit for the former Canterbury second-row forward.