Jack Spencer says he wants to finish his career at hometown club Swinton, after joining them from rivals Oldham.
Spencer, 30, had a stint in Australia with Wests Tigers earlier in his career and has spent the past six years with the Roughyeds.
He said: “Playing for Swinton is something that’s been in the back of my mind for probably a couple of years now.
“I feel like this is the right time for me to come and finish my career at my home town club.
“I’m looking forward to a big year and hopefully winning another League 1 title.”
The former Folly Lane junior can play at prop or the back-row.
Coach Allan Coleman added: ““It’s great to get Jack Spencer on board at the Lions.
“He’s someone who the club has been interested in for a number of years and it’s good to finally get his signature. His experience will be massive for us as a club, on top of which he’s a Swinton lad.
“Jack is a tough middle who will help lead our young squad next season.”
Existing Lions commit
His signing comes hot on the heels of two key retentions for Coleman and the Lions
Full-back or winger Mike Butt has committed for an eighth season at Swinton, where he has already scored 77 tries in 133 appearances.
He said: “I’m really excited to see what Allan can do with us next year.
“The lads he has signed all have the same work ethic and have one goal in mind, and that’s to get us back into the Championship.”
Ireland international Will Hope has also agreed to remain at the club.
Hope, 28, previously played for Salford, Oldham and Sheffield.
He said: “I’m very proud to sign with Swinton again, because it’s the only place to play for me. This will be my fifth year at the Lions and I’ve enjoyed every one of them.
“Working under Allan, and with some exciting new additions the squad, it should be a great year ahead. I’m really looking forward to the challenge!”