UPDATED 03:09 4th September 2016
Northern Ireland international Lafferty joined the Blades on a season-long loan from Premiership new boys Burnley on transfer deadline day in August 2016. The 27-year-old began his career with Celtic before moving to Ayr United. A spell with Derry City followed before he got a move to England with the Clarets. First-team opportunities have been limited at Turf Moor, but the left-back has notably impressed during loan spells with Rotherham United and last season at Oldham Athletic.