Wigan back-row forward Chris Tuson has pulled out of a move to Wakefield and has instead joined Hull on a two-year deal.
The 25-year-old rejected a new offer from Wigan and signed a two-year contract with the Wildcats in June.
However, Wakefield have since hit financial trouble and said they would not hold the player to the deal.
Tuson, who is hoping to play his final match for Wigan in Saturday’s Grand Final, said: “I decided that it was the right time to leave Wigan and the opportunity to join Hull FC was too good to refuse.
“I had a couple of options on the table, which included Wakefield who made me a very good offer, but I think it is a no-brainer for any player when a club like this comes along.
“They’re similar to Wigan in many ways and hopefully the club can push on and enjoy the success they have over the last few years. I am really excited about playing my part in that.”
Tuson becomes Hull’s fourth new recruit for 2014 following the signing of Castleford second rower Jordan Thompson, Hull KR prop Mickey Paea and former Wigan front rower Iafeta Paleaaesina.
He is the first signing since the appointment of Lee Radford as Hull’s new head coach.