When you run out of 'K's you have to improvise
It's a common practice throughout baseball stadiums to have a specific area to track all of the strikeouts recorded by the home team. It's a fun way to keep fans buzzing about any given pitching performance, and during record outings like Kerry Wood's 20-strikeout game, tracking all the "K" signs out there gets pretty crazy! What happens if you run out?
Giants fans at Oracle Park found themselves in this predicament during Friday night's 18-inning marathon. Through 17 frames, the Giants' pitching staff combined to fan 21 Rockies, using up the entirety of the right-field fans' strikeout signs. So when Travis Bergen got the K's going again in the top of the 18th, it was time to improvise:
= new reply since forum marked as read
A forward K is a strikeout by swinging, the backwards K is a called strikeout. If you think about it, the backwards K's are really just upside down K's; they're sneaky that way 
without the orange ones, I'd come up with five different numbers. Think about it.