You know the setup, pitcher has like a 1-2 count on the batter, throws a sinker and the batter swings but the ball goes into the dirt and gets past the catcher. The alert batter sees the ball get past the catcher, and makes it to first base.
How’s that recorded in the stat book? Is it a K for the pitcher? Does it count as a strike out for the batter as well? Hell, maybe it even counts for a stolen base?
It’s just recorded as a strikeout for the pitcher with a putout or an assist for the catcher, depending on whether he tagged the batter or threw to first. Catchers don’t get errors on dropped balls, they only get recorded as passed balls if a runner advances.