It's Rick Monday 'flag-saving' bobblehead night. That is, it commemorates the time Cubs outfielder Rick Monday saved an American flag was being burnt on the Dodgers Stadium outfield from a few protestors. Thanks to the item being on eBay already, we can catch a glimpse of it on this here Internet:
For those who don't know the story of one of the most patriotic moments in baseball history, here is a video explanation:
So that was Monday playing for the Cubs in Dodger Stadium. Obviously the timing of this promotion is no coincidence.
Monday would later play eight years for the Dodgers, winning a World Series ring and playing in two other World Series.
Well done, Dodgers marketing department.