psi

NFL data chips in game balls won't extend to psi reading, source says
Though the technology exists and could be potentially added if the NFL desires, the data chips to be used in game balls in 2016 won't provide real-time psi (pounds per square inch) measurements.
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Robert Kraft wrote Roger Goodell a letter asking for draft picks back
Kraft: Apology owed if no findings
NFL looking at Patriots attendant
Pete Carroll says he can 'empathize'
Belichick: Pats 'followed every rule'
Tom Brady: No contact yet with NFL
Bears equipment manager in charge