I found this gem over at the mental_floss blog, featuring ex-Mariners and current Cubs skipper, Sweet Lou:

In 2002, Costner played for Single-A San Bernardino in a spring training exhibition game against the Seattle Mariners. Costner, whose baseball-heavy filmography includes Bull Durham, Field of Dreams, and For the Love of the Game, went 0-for-3 and committed an error at shortstop. In the final inning of the Mariners’ 12-4 win, Costner was summoned to pitch. Mariners manager Lou Piniella, who later told reporters that “Costner looked tempting,” inserted himself as a pinch hitter. Costner’s first pitch was up and in, sending Piniella sprawling to the dirt. “We try to tell our players not to charge the mound, and I’ve got to set the example,” said Piniella, who drew a walk.

Now this was only 8 years ago, when Piniella was the tender age of 58. Think Lou would do this today?

Go Cubs!