from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Baseball A fastball released with most pressure from the tip of the middle finger so that it breaks slightly in the manner of a curve ball as it approaches the plate.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A pitch thrown with an offset grip and a moderate amount of added pressure by middle finger yielding a combination of backspin and some sidespin, resulting in motion to the left when thrown by a right handed pitcher with velocity only slightly diminished from that of a fastball
Sorry, no etymologies found.