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Boone announces Chapman to IL with infection in leg from a tattoo (1:55)

A tattoo resulted in Aroldis Chapman's leg infections. 1:45

8:06 PM ET

The Yankees placed Aroldis Chapman on the injured list because of a leg infection.

Speaking before the Yankees took on the Oakland A's in the third game of a four-game series, they said the problem was with a tattoo.

The veteran, who is no longer the closer in New York, has not pitched in over a month. Chapman is expected to pitch again this year.

The Yankees have been short-handed throughout the summer. New York won't call anyone up this weekend because Clay Holmes, who is on the injured list, will be back next week.

Chapman has a 4.70 earned run average this season and a 1.44 WHIP. Chapman is going to be a free agent this year.

The Yankees entered Saturday with a nine-game lead for first place in the American League East, and they had a five-game winning streak that included a sweep of the New York Mets.