He is running from Arlington because there is only room for one star on that day, and unlike EC, Showing Up won't choke in the Secretariat and lose to a nobody like Gun Salute. I would keep EC at Saratoga too because he is going to need to be 100% ready to go in the Turf Classic because the horse the bloodhorse called the "new star of american turf racing" loves the Belmont turf.