They did n't collect it in a controlled setting , they used shoddy equipment , they did n't account for climate changes .
The 2015 season proved that footballs routinely dipped well below 12.5 PSI .
They did n't collect it in a controlled setting , they used shoddy equipment , they did n't account for climate changes , and the 2015 season proved that footballs routinely dipped well below 12.5 PSI .