"We just thought we were getting the short end on the low pitch," Melvin said. "I just found out I can't argue balls and strikes."
Stroman had also struck out the previous batter, Marcus Semien, who had words with Wegner, resulting in Melvin coming to the top step of the dugout to argue before Wegner waved him away. The A's trailed, 7-3, at the time of the ejections.
Danny Valencia entered the game at first base in the fifth and went 1-for-2 at the plate.
Mark Chiarelli is a reporter for MLB.com based in the Bay Area. This story was not subject to the approval of Major League Baseball or its clubs.