McDonald made his debut for the Blades against Brentford on 13 August 2011 .
At the end of the 2010 -- 11 season McDonald was released by Burnley and undertook a trial with Sheffield United leading to a one - year contract with the South Yorkshire club .
McDonald made McDonald 's debut for the Blades against Brentford on 13 August 2011 .
At the end of the 2010 -- 11 season McDonald was released by Burnley and undertook a trial with Sheffield United leading to a one - year contract with the South Yorkshire club .