Boston Red Sox designated hitter David Ortiz confirmed to the Boston Herald on Thursday that he was hospitalized last weekend for an irregular heartbeat.

Ortiz told the Herald he began experiencing a rapid heartbeat Friday night after the Red Sox were swept by the New York Yankees in a doubleheader at Fenway Park. Although Ortiz played Saturday, the problem persisted and the Red Sox medical staff advised him to visit Massachusetts General Hospital, where he was held overnight for observation.

Ortiz, who is hitting .286 and leads the majors with 46 homers and 120 RBI this season, didn't miss any time during the Yankees series.