This came up for an on-line player profile ... son's fastball was read at 85 on radar at a recent summer showcase, but how does that translate into "arm speed", which I don't have a special measurement of?
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Just thinking out loud that radar guns sometimes measure velocity of the ball at some point along the 60'6" travel where the ball has already lost velocity due to air drag, versus velocity at the release point.
depends on the type of gun .you can do a search but jugs is out of hand (same speed of hand or real close) stalker 1-2 mph slower.
I am sure that the showcase used a Jugs. These units measure muzzle velocity. Speed of the arm and the ball leaving the hand are identical for all practical purposes.