Starting this preseason, the NFL will launch a new way of collecting stats, by using data chips inserted into footballs. The chips will be used during the preseason as well as Thursday night games during the regular season.
The chips will weigh three grams, and be put inside the ball just under laces, per Kevin Seifert of ESPN. The low weight and placement of the chip is not supposed to influence the flight of the football.
When I originally saw the report, my initial hope was that they would track the PSI of the footballs. However, Seifert had the same thought as me, and unfortunately, the balls will not track PSI.