Mariano Rivera diagnosed with migraine headaches

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Mariano Rivera has been experiencing off-and-on headaches for the past two weeks, so the Yankees decided to get to the bottom of the matter. George A. King III of the New York Post has the update:

The headaches weren’t as strong, but they didn’t go away. So Friday the Yankees sent baseball’s all-time saves leader for tests to determine the cause of the headaches.

“When you have issues you want to make sure everything is OK,’’ Rivera said of the CAT-scan and blood test.

“They said it seems like migraine headaches.’’

Rivera will make his scheduled relief appearance Sunday in a Grapefruit League game at Steinbrenner Field in Tampa and should be able to treat the migraines with medication throughout the 2013 regular season. The Yankees, it seems, are not overly concerned.

“There are protocols and we ran through them,’’ general manager Brian Cashman said on Sunday. “Even if there is one-half of a percent [of a problem], you want to rule it out. We weren’t worried about it.’’