Gomes, 34, is batting .221 with seven home runs and 22 RBIs in 82 games this season. The Royals will be his seventh team in 13 seasons.
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Kansas City, which held a comfy 13-game lead atop the AL Central heading into Monday, will also get a boost when outfielder Alex Gordon returns to the lineup Tuesday. Gordon has been out since early July with a groin injury.
