 Quinn signed for Sheffield United in 2005 and graduated from the Sheffield United Academy, he made his first team debut for the Blades in a League Cup win at Shrewsbury Town on 20 September 2005.Quinn spent some of the 2005–06 season on loan with Milton Keynes Dons and Rotherham United respectively, becoming a fan favourite at "The Millers" where his performances helped them to avoid relegation.Quinn made his Premiership debut for the Blades against Charlton Athletic, and could have almost scored within the first 40 seconds of the game.