 However, Rotherham were unable to extend the deal as he was called back by parent club Blackpool after playing five games for the "Millers".Blackpool loaned Harris to Nigel Clough's Sheffield United, playing in England's third tier, in January 2014; "Blades" defender Tony McMahon travelled in the opposite direction on a similar deal.After making his club debut on 26 January 2014, in an FA Cup tie against Fulham, Harris signed a permanent deal for Sheffield United, with McMahon agreeing to remain with Blackpool on a permanent basis with the option of another year.