Kevin Youkilis wanted to play Tuesday against the Phillies. Joe Girardi had other ideas. After experiencing soreness on his left side on Monday, Youkilis was scratched from the short bus ride to Clearwater and given the day off for precautionary reasons. “Basically, yesterday I had a little cramp,” Youkilis said Tuesday morning in the Yankees’ Tampa clubhouse. “That just turned into, we’re going to be precautionary. I’m fine. I could play today and I’m perfectly fine, but they were just like, ‘No, we’re going to sit you out.’ ” Youkilis believes the cramp resulted from dehydration, as it came following the Yankees’ workout and his running program. He said it went away after he drank some water, but the team wasn’t taking any chances. “The doctor said (it was) very, very mild, just a little thing that happens,” the third baseman said. “I think I kind of learned my lesson, too. Don’t say you’re tight. . . . It’s my first week here, and now I understand the terminology and what to do.” With Phil Hughes recovering from a bulging disc in his upper back and Curtis Granderson out until May with a fractured forearm, the last thing the Yankees need is another injury to a key player. Read more: