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Actually it will. As you noted. MLB pitch plane is like 2-3 degrees. The more your attack angle increased the more you’re hitting a top spin tennis return.
My point was an overly uppercut swing isn't going to result in that low a launch angle. Not unless he is somehow consistently topping the pitches, which seems pretty unlikely.
There are issue with readings, just like everything else in life. It’s not perfect. I’ve seen thousands of balls put in play using tech and can tell you that out there are mistakes.
Maintenance, calibration, location of hardware all in play.
There’s a big difference between launch angle and attack angle.
Launch angle is ball coming off bat (results of contact). Attack angle is angle of bat through zone.
4.4 attack angle is good but slightly high. 4.4 launch angle is terrible result.