i have that pose as db's on my 1926 navy squad. they seem to work out ok for that position.
remember, when these poses were originally sculpted in the 50's/60's, they were relevant to active football at the time. "chickenwing" blocking was taught well into the 80's, maybe it still is, i don't know.
the point is, the sculpter just interpreted what he saw to be a natural pose for a linebacker or a db, and created the arms out figure.
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