And of course, the game will mark the return of former Royals designated hitter Billy Butler, who will be presented with his 2014 American League championship ring prior to the game.
Butler has been looking forward to this weekend for some time -- it's also his birthday on Saturday.
"Ever since I signed with the A's," he said, "I realized on the schedule I would be there on my birthday. It'll be fun. I don't know how the game looks from the third-base side."
Jeffrey Flanagan is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.