Leeds United and clubs across the country are tasked with publishing their retained lists by the end of this month. This is when players who are out of contract are confirmed to either be staying put at their current clubs, or released on a free transfer. Leeds themselves a number of decisions to make regarding those whose deals are expiring in the coming weeks, with Liam Cooper, Sam Byram and Jamie Shackleton among them. Cooper has all but confirmed he will be bringing his 10-year stay at Elland Road to an end this month, but as for Byram and Shackleton, there has been no word on what might h…