The PFF Drop Rate. Often receivers have been lambasted for their numbers of drops and while that can be fair game, how can we compare one player dropping 20 balls when he is thrown 150, to another dropping six when he is thrown 40? Well, what we’ve done is gather a few numbers to really answer which receivers have the best hands. Firstly, we’ve created the catchable balls number which adds up catches and drops. We then collect a percentage of how many drops a receiver had by their catchable balls, and presto! …you’ve got yourself a ‘drop rate’ — the best metric out there for determining the hands of receivers. So then let’s see, out of wide receivers thrown at least 40 catchable balls, who is the top dog.