For pitchers 16 years of age and older, in highly competitive ball, here's something to look for when facing batters.
A batter will actually strike himself out - IF you know where to look and when to take advantage of it.
Some batters have the tendency to dip their back knee DOWN on every incoming pitch, or at a minimum, on a pitch that they think might be in the strike zone - then they hesitate.
For example, take a look at our picture below. This batter actually dipped his knee DOWN, right into the path of that incoming pitch - STRIKE!
A greater percentage of the time, the batter will argue that the umpire has a very low strike zone and NO WAY that was a strike. By the way, plate umpires are not in the game to explain the rules or anything close to it.
A batter's frustration will usually lead to a mindset that has the batter thinking.. " Geessh.. I better swing at anything that's down. I'll probably be called out on strikes any way."
So, pay attention to the movements of a batter's back knee. This is more common than you think.