Full-back Luke Ayling penned a three-year deal with Leeds in the summer of 2016, joining the Whites from Sky Bet Championship rivals Bristol City.
Ayling began his career at Arsenal and progressed through the ranks, before moving to Yeovil Town in 2010.
Spending four years on the books at Huish Park, Ayling helped the Glovers achieve promotion from League One in 2013.
He was snapped up by Bristol City the following year and helped the Robins secure a return to the Championship from League One.
Ayling became United's first choice right-back during the 2016/17 campaign, going on to make 43 appearances in all competitions.