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Learning more on how referees test and document football air pressure

PHOENIX — Some of the lingering questions I’ve had about the process in which referees test and document air pressure in footballs were answered today. It helps add more context to the NFL’s investigation into underinflated new england patriots footballs.

As written in Sunday’s “quick-hit thoughts” entry, these were things that piqued curiosity:

Who is there when the footballs are tested?
Is air pressure in each ball documented?
How are they tested? more