Myth #26 - A pitch that bounces to the plate cannot be hit
A pitch is a ball delivered to the batter by the pitcher. It doesn't matter how it gets to the batter. The batter may hit any pitch that is thrown legally. A pitch that bounces before reaching the plate may never be a "called" strike or a legally caught third strike. If a batter swings and misses at a ball that bounced before reaching the plate, it shall be a strike (swinging strike).
LL Playing Rules: 2.00 Definition of Terms: PITCH, STRIKE (a)
The Right Call - Casebook of Little League Baseball (2004): Page 9 Comment on Definition of In Flight