Wakefield have announced the signing of Adam Walker on a two-and-half year deal.
The prop, 26, has joined Trinity from St Helens and will link up with Chris Chester and the first team squad straight away.
Walker, who has represented Scotland, has had extensive experience in Super League after he started his career in 2010 for Huddersfield Giants before signing a deal at Hull KR in 2013.
Towards the end of last season he signed for St Helens on a two-year deal and has since made nine appearances, making his debut for the Saints against Wakefield back in February.
Wakefield boss Chris Chester said: “I’ve worked with Adam for a number of years, and we’ve got a good relationship.
“He is one of the best young British forwards in Super League and we have beat off a host of other Super League clubs for his signature.
“I would like to thank St Helens and Michael (Carter) for making this deal happen and I’m sure he will become a fans favourite at the club for many years.”
Walker added: “I’m looking forward to getting out there. I’ve known Chris most of my professional playing career.
“I met him when I played for Scotland about six or seven years ago and I know what to expect from him and he knows what to expect from me, so I’m looking forward to playing under him again.”