Eamon O'Carroll is Hull FC's fifth signing ahead of the 2012 season
Hull FC have signed Wigan prop Eamon O'Carroll on a three-year deal.
"To join a club like Hull is massive," said the Ireland international, who scored two tries in 56 Super League games for Wigan, but has spent most of this season out injured.
Hull captain Craig Fitzgibbon's career looks to be over after his ankle ligament injury against Castleford.
"It didn't look great," said Hull coach Richard Agar. "It's too early to guess but he will have a scan."
Fitzgibbon, 34, has announced that he will retire at the end of the season and long-term damage could see him miss the end-of-season play-offs.
The 19-times capped Australia international joined Hull from Sydney Roosters in 2009.
Fitzgibbon, whose father Allan played for Hull Kingston Rovers, has made a total of 44 appearances in his two years with the Black and Whites, running in nine tries.
Eamon O'Carroll is Hull FC's fifth signing ahead of the 2012 season, following Leigh scrum-half Jamie Ellis and a trio from Down Under, Wests Tigers full-back Wade McKinnon and New Zealand Warriors duo Aaron Heremaia and Brett Seymour.