Middlesbrough have signed Blackburn Rovers defender Darragh Lenihan on a four-year contract.
The 28-year-old was club captain at Ewood Park but turned down a new deal earlier this month.
The Republic of Ireland international played 252 games for Rovers after joining from Belvedere in 2011.
Boro boss Chris Wilder praised Lenihan's qualities "as a player, a person, a competitor, a warrior and a leader of men".
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