Coach Brian McDermott has named the pair in an unchanged 19 from last week’s win over Hull KR.
Jones-Buchanan has missed Rhinos’ last three matches - and eight of their past nine - due to a hamstring problem.
Delaney sat out the 36-16 victory over the Robins after suffering a leg injury against Huddersfield Giants in the Challenge Cup six days earlier.
Rhodri Lloyd drops out from the Wigan side crushed 58-16 at Catalans Dragons last Saturday.
Ben Flower could return after injury and Connor Farrell and Ryan Hampshire are also vying for a recall.
Rhinos will take on Wigan in the final game of the Magic Weekend’s opening day at St James’ Stadium.
The Leeds team will be selected from: Hardaker, Handley, Watkins, Moon, Hall, Sinfield, McGuire, Cuthbertson, Aiton, Peacock, S Ward, Achurch, Ablett, Burrow, Sutcliffe, Singleton, Walters, Delaney, Jones-Buchanan.
Wigan’s squad is: Bowen, Charnley, J Tomkins, Sarginson, Burgess, Powell, Smith, Crosby, McIllorum, Mossop, Bateman, Patrick, O’Loughlin, Williams, Tautai, Sutton, C Farrell, Flower, Hampshire.