Four-seam grip crosses 4 seams. High spin produces apparent 'rise' and drives whiffs.
95+ mph is solid; 98+ is dominant. Sasaki and Ohtani routinely break 100 mph.
Locating up in the zone uses the apparent-rise effect to boost whiffs (Imanaga's signature).
Recent research on Seam-Shifted Wake explains different movement on visually similar pitches.