Thursday, July 03, 2014
More physics on great throws
Eric does all the roll-up-the-sleeve work here.
It's important to note that outfielders can step into the throw, unlike pitchers. The typical walking speed is about 3-4mph, so if you see Aroldis Chapman throwing at 105mph, maybe 101mph of that is due to everything except his step-in.
With an outfielder, he's running as he's about to plant his foot. So, if his body is moving at 10mph at that moment. If Parker is throwing at 109mph, maybe it would have been 102mph had he thrown off a mound. If his running speed is 13mph, then maybe it would be 99mph off the mound.?
Bo Jackson threw it flatfooted at 96mph when he nailed Reynolds. So, off the mound, he might have thrown it 99 or 100mph.
So, be very careful how you compare these release speeds.
I know in the NHL, they had this issue with shots, where in one shot skills competition, the player had to take the shot without skating in, but in another year, he was able to coast into the shot. Well, that extra speed of coasting gets added to his "flat-footed" time, and so, when we saw the extra 5mph or 10mph on the shot speed, it was easily explained because of the differing ways they were able to take the shots.
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