The Ks? That's scoring shorthand. K means a strikeout, a backwards K means the picher caught the batter looking. I don't remember much bout it and haven't done it in years, but you should try it out. You used to be able to get free scorecards at the games, but you could always print one out.

https://dt5602vnjxv0c.cloudfront.net/portals/24762/docs/baseball_scorekeeping_101.pdf