London Broncos have boosted their numbers ahead of the start of the new signing by bringing in three more players.
Former Catalan Dragons utility back Ben Farrar has joined the club, who have also re-signed threequarter Jamie O'Callaghan and taken St Helens prop Carl Forster on a month's loan.
Farrar, 27, is looking to get his career back on track following two injury-ravaged seasons with Manly Sea Eagles in NRL.
O'Callaghan, 23, is one of the London club's longest-serving players. He made his Super League debut in 2008 and over the next six seasons made 94 first team appearances scoring 20 tries.
He returns to the club after initially signing for Championship One club London Skolars for 2014.
Forster, 21, has made four appearances for the Saints and also spent time dual registered with Swinton and Rochdale.
Saints CEO Mike Rush said: "Although Carl is in the early stages of his career, he has had a good pre-season and has shown a lot of potential.
"It's clear he needs to be playing week in week out at the highest level and going on loan to London will give him that chance."
Rush also confirmed he club will be announcing their list of dual-registered players shortly.