Liam Hulme is one of three more signings announced by Swinton.
He’s a highly rated prospect, played for England schoolboys and is the son of former Great Britain, Warrington and Widnes star Paul.
Swinton director of rugby Paul Kidd said: “Liam is a quality player with a great pedigree. He’s a young lad who wants to make his way in the game and he will get every opportunity with us.
“We are a bit light in the forwards so the arrival of Liam and the return of David Mills is good news for the club.”
“It was important to get Millsy back on board because he’s very experienced and did a really good job with some of the younger players on our team,” said coach Steve McCormack.
“It took him a while to settle down last season but he’s a players’ player and there are a lot of things he did for us that weren’t standout things.
“But he started playing his best rugby towards the end of the season and I’m delighted to have him back.”
The Lions currently have 16 players signed up and squad is as follows: Chaz I’Anson, Martin Ainscough, Darren and Ritchie Hawkyard, Mark Smith, Kevin Penny, Alex Hurst, Chris Clarke, Sam Reay, Neil Holland, Ian Watson, David Mills, Andy Ballard, Josh Barlow, Liam Hulme, Kash Watkins.