If you listen to Joe Marino, you've heard this. I'll post the YouTube video below of his podcast as well as the source material it was quoted in.   Both are super interesting.   Basically, Josh Allen’s UCL injury is why we may have shifted to a more downfield passing game.   From Dr Kyle Trimble: “the arm/elbow angles based on the type of throw affect how much pain there is and how much stress was placed through the joint. Deeper throws require less accuracy due to