He is returning to the NRL, where he has signed a two-year deal with the St George-Illawarra Dragons.
“He is a really good bloke who I know will want to end his Saints career with more winner’s medals.”
“Naturally we’re disappointed to lose Mose but we wouldn’t stand in the way of a player who wants to return home,” added Saints chief executive Mike Rush.
“He is enjoying his time in St Helens and has settled in well – becoming a real fans’ favourite.
“Having spoken to Mose he is determined to finish the rest of this season on a high and once again cap it with a Grand Final winner’s medal.”