Every company, of any reputation, gives it's employee's a performance review. This is something that might happen quarterly, if you're in sales, or annually if you are Santa Claus.
Whatever the terms may be, it is quite clear that as employees our performance is always under observation. The Buffalo Bills in that sense are no different from the company you, or your parents, might work for.
Each year the management team looks at cash flow, ticket prices and player contracts, amongst other factors to determine what are the best business moves they can exercise to make more money or put a better product out on the field, hopefully.
While it is not for certain whether or not next season will even happen, or what impact this shortened off-season will have, one thing is quite clear: when the season does start some Buffalo Bills will have a bulls-eye target on them. This target signifies that it is a make or break year for them.
The criteria used for deciding which Buffalo Bills made this list was based on one of the following factors, their contract ending soon, questions about their long-term status with the team based on age, high salary, declining production or competition from back-ups. So basically any player not named Kyle Williams or Marcell Dareus could be on this list.