"I remember the light-colored uniforms," Showalter said before the game. "The coaches wore white hats. That [former owner] Charlie Finley was ahead of his time."
Finley championed the designated-hitter rule and also tried to get baseball to adopt a designated-runner rule.
Oakland and the New York Yankees are the only teams to ever win as many as three consecutive World Series titles. Reggie Jackson, who was in town for the pregame ceremony, was a big reason for both.
"I got to know Reggie when I was in New York," Showalter said. "We used to talk about those teams all the time. I thought some of the teams Tony [La Russa] had here were similar."
Rick Eymer is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.