1. On October 11, 1969, Willie Mays made his last appearance in a Major League Baseball game at the age of 43. The game was held at Phoenix Municipal Stadium in Phoenix, Arizona, where he played for the San Francisco Giants in a preseason exhibition game against the Oakland A's.

2. In 1980, Arizona Senator Barry Goldwater was honored with a banquet and a parade in downtown Phoenix on October 11, marking his retirement from the United States Senate after serving for 30 years.

3. On October 11, 2001, the Arizona Diamondbacks played their first home playoff game in franchise history, defeating the St. Louis Cardinals 5-3 in Game 1 of the National League Championship Series at Bank One Ballpark (now Chase Field) in Phoenix.

4. Arizona State University's "Football Legends" monument, which honors several prominent former Sun Devil football players and coaches, was dedicated on October 11, 2003. The monument, located at the north end of Sun Devil Stadium in Tempe, includes plaques commemorating Pat Tillman, Jake Plummer, Danny White, and other notable figures.

5. The inaugural "Arizona Taco Festival" was held on October 11-12, 2014, at Salt River Fields in Scottsdale. The event featured more than 50 taco vendors, live music, lucha libre wrestling, and a margarita mixology competition.