The way it was explained to me is that they want to get an angle that allows them to see the ball enter the open glove. Not just the 90 degrees that is taught at umpire school, but actually see the ball enter the glove. That way they are sure they have a catch and not something else. Remember the play at the CWS where U1 didn't see what everyone else saw on the ball be bobbled and trapped on the opposite side of the fielder away from U1. He called the runner out when every replay showed what U1 could never see from where he was even though he had a good angle on the play and the throw, but they way it got caught at the bag blocked him out. Also watch how MLB guys go out on balls now. They go out and develop an angle that will allow them to see he ball enter the glove, the work very hard to get where they need to be to see the ball go into the glove. Hence "open glove"!
ome good friends that are AAA sups and guys that I work with in the PCL have done the best they can to explain to me, but I wasn't in spring when they went over it there.
Ask your self this. Ever wonder why on a ball to 2nd we take a step or two off the line inside and the MLB guys go way in and look like they are gonna get hit in the back of the head on TV some times?
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