 On 26 March 2010, Fleck signed a new three-year contract.That summer, he had a strong pre-season but then suffered a hamstring injury early in the campaign which hampered his progress.With first team chances in short supply at Rangers, Fleck agreed to move to Sheffield United on a season-long loan at the end of the 2011 summer transfer window but the deal subsequently fell through as the paperwork was not completed before the deadline.