Pro Football Focus has grown more prominent in recent years, and has become a mainstay of a lot of media folks. Cris Collinsworth’s investment in it has gotten it a lot of publicity on NBC’s Sunday Night Football broadcast, but even beyond that, Peter King, ESPN, and others have taken to using their grades and statistics.
Over the past couple years, media members will mention a particular PFF stat or grade in a press conference, and sometimes coaches and players raise issue with it. On Thursday, Chip Kelly spoke to 49ers media, and the issue came up in discussing Marcus Martin and Andrew Tiller.