The Yankees' optimism that newly acquired lefty starter J.A. Happ will make a quick recovery from hand, foot and mouth disease is gone.
Instead of flying to Boston to make a scheduled start Saturday afternoon against the Red Sox at Fenway Park, Happ was placed on the 10-day disabled list Thursday afternoon.
Happ's start will be filled by righty Luis Cessa, who was recalled from Triple-A Scranton/Wilkes-Barre earlier Thursday.
Happ's DL stint will be backdated to Monday - the day after his successful Yankees' debut - which makes him eligible to be activated on Aug.