William Haggas' Mutajarred will make his seasonal debut off top weight in Saturday's 50th John Smith's Cup at York.Not seen since finishing eighth in a Listed race at Newmarket last November, the five-year-old heads a maximum field of 20.Godolphin's Moonquake, the mount of Frankie Dettori and second in the Wolferton at Royal Ascot, is next on the list, followed by Re Barolo. Sir Michael Stoute's Kingdom Of Fife, owned by The Queen, has been aimed at this race since winning the Zetland Gold Cup at Redcar.Luca Cumani's Riggins, the Jim Goldie-trained Nanton and David Barron's Sirvino, who arrives on a five-timer, are other interesting runners.Lower down the handicap, Ben Chorley, Alazeyab, who needed a penalty to get into the race, and Ralph Beckett's Seeking The Buck add spice to the contest.Richard Fahey, who has won the last two renewals of the race, this year goes to war with Albaqaa, Unbreak My Heart and Deep Winter.