A fun article (and video) that explores the dynamics of throwing and hitting the fastball.
Why It's Almost Impossible for Fastballs to Get Any Faster (unless you are Sidd Finch)
By Robbie Gonzalez - Wired
Why It's Almost Impossible for Fastballs to Get Any Faster (unless you are Sidd Finch)
By Robbie Gonzalez - Wired