Oakland Athletics - Wikipedia
Hot Pants Day' and four other Oakland A's gimmicks from the 1970s
When the New York Mets Replaced Mr. Met With a Live Mule
Reds vs A's: One of Baseball's Strangest Rivalries
Charlie-O the Mule (Oakland Athletics), SportsMascots Wikia
Charlie-O — Baseball's Favorite Mule, by Michael Murphy
The closest MLB team to Seattle is Oakland the A's owner is so
Weirdest old mascots in baseball history
List of Major League Baseball mascots, Baseball Wiki
San Francisco, CA: San Francisco Giants mascot Lou Seal looks on