 After signing a new contract with the club, Treacy made his Blackburn Rovers début in a League Cup tie against Portsmouth as a substitute and made his first start against Coventry City in the FA Cup third round in a 4–1 defeat back in 2008, before being substituted off and replaced by striker Matt Derbyshire.Treacy made his league debut for the club in the opening game of the season, in a 3–2 win over Everton on 16 August 2008.Treacy went on to make twelve appearance throughout the 2008–09 season.