Perhaps If his arm is drained he relies on the curve way more. Or any hook. Would seem dead arm would demonstrate up nor prominently on rapid ball velocity, not anything hooking. Hemagglutinin inhibition (Hello) assay: The Hello assay checks for antibodies into the hemagglutinin of the specific influenza virus https://www.dailypioneer.com/2019/business/amul-hikes-milk-prices-by-rs-2-ltr-in-delhi---other-majort-mkts-from-tomorrow.html