OAKLAND, Calif. -- The Yankees got the news they hoped for when an MRI exam on Saturday revealed that Nick Swisher has a mild strain of his left hip flexor, and nothing more serious.

"He's not going to play tomorrow and I don't know if we'll see him in Seattle," manager Joe Girardi said after Saturday night's 2-1 loss to the A's. "(We'll) see how he responds to treatment."

Swisher, who was injured while trying to beat out a ground ball in the seventh inning on Friday night, said he was relieved that the injury was not more serious.

"After hearing that it puts your mind at ease," he said. "You know exactly what you are dealing with."

Even if Swisher misses all three games in Seattle, a series starting Monday, the Yankees would be able to play a man short, Girardi said.

"We can do that if we have to," he said.

Dewayne Wise, who started in Swisher's place in right field on Saturday night, is a left-handed hitter. The Yankees will face all right-handed starters for the rest of this trip.