There just aren't enough days remaining on the exhibition schedule for Gentry and Cook to be ready. "I know, right now, they like having me in Minor League games because I can lead off and get as many at-bats as I want," Gentry said Friday. A's manager Bob Melvin on Sunday made official what had been speculated all along by announcing that outfielder Craig Gentry and righty reliever Ryan Cook will begin the season on the disabled list. Gentry's temporary absence, brought on by a lower back strain suffered early in camp, paves the way for Sam Fuld to make the roster. With Cook unavailable on Opening Day, the A's are likely to carry lefty Joe Savery in a bullpen that's also expected to include Jim Johnson, Sean Doolittle, Luke Gregerson, Dan Otero, Evan Scribner and Fernando Abad. Friday marked the earliest day teams can backdate their players on the disabled list if the intent is to have them spend no more than six days on the DL when the season opens.