Nationals left fielder Elijah Dukes was carted off the field in the seventh after straining a tendon in his right kneecap. Dukes slammed into the left-field wall backward after catching a fly ball. Mets starter John Maine left in the sixth inning with a cramp in his left forearm. Royals right fielder Jose Guillen was involved in a heated exchange with Kansas City pitching coach Bob McClure in the clubhouse before the game. Guillen and McClure argued face-to-face, but no punches were thrown before players and coaches separated them.
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