We've known this for roughly two months now, and it has been re-confirmed today.
All the way back on March 24, ESPN's Mike Rodak passed along word from Buffalo Bills general manager Doug Whaley that the team would not be featured on HBO's Hard Knocks this year.
Doug Whaley confirms that the Bills won’t be doing Hard Knocks. Said it’s not the Pegulas’ "cup of tea," nor his.
— Mike Rodak (@mikerodak) March 24, 2015
Despite this, nearly two months later, reports began surfacing on Friday morning that the Bills are among three contenders to be featured on the show.