Castleford Tigers prop Mitch Cleark saignes untuil the end of the season
The 26 year old was released from the Tigers with him due to join Wigan next year on a three year deal.
Leigh Centurions head coach John Duffy said: "I coached Mitch at Fev last year and he's come on leaps and bounds in the last couple of years. He's been absolutely superb in Super League, changing the tempo of games when he's been on the field at Cas.
"He's a no-nonsense type of player and he'll soon become a big favourite of the North Standers.
"He's a really nice bloke and he wants to come to Leigh and finish the year off playing good rugby before he starts with Wigan.
"I'd like to thank Jon Wells and Daryl Powell at Cas for allowing Mitch to join us."
Mitch Clark said: "I'm really excited to be coming to Leigh. I was training hard as Cas but not getting game-time and so the chance to get back playing was very exciting.
"I'm really grateful to Leigh Centurions for the opportunity they've given me.
"I played under Duffs on loan at Fev last year and he's a top bloke. I really enjoyed my time at Fev and having the chance to play for him again was a big factor in my decision. I like the way he approaches the game and what he wants from his players.
"There is a lot to play for with Leigh Centurions for the rest of the season. We've got a good run of home games coming up and it's an exciting prospect."
It follows the signing of Junior Sau fro Salford earlier this afternoon