A combative player who can apply himself equally in midfield or defence, Darragh joined Rovers from the famous Belvedere Football Club of Dublin in the summer of 2011.
Unfortunately his first couple of seasons were blighted by a back injury, but a strong second half to the 2013-14 campaign saw him captain the development squad and named amongst the substitutes for a pair of first team matches.
October 2014 saw the Irishman join League Two side Burton Albion on loan initially for a month. But excellent displays for Jimmy Floyd Hasselbaink's side saw his stay with the Brewers extended until March, playing a huge part in their title-winning campaign.
Recalled by Rovers for the end of season run-in, Lenihan made his debut at Ewood Park as a first half substitute in the win over Millwall in April 2015, with two further starts at the close of the campaign.
However the midfielder was rarely involved at the beginning of the 2015-16 campaign, but a change in manager brought about a change in fortune for the Irishman as he went on to make 27 appearances.
He has since gone onto be one of the mainstays in the Rovers squad. Making 44 appearances during the 2016-17 season.
On the international stage Darragh has honours for the Republic of Ireland, having represented and captained his country up to Under-21 level.