When it comes to making player decisions in the NFL, you need to stay away from this concept at all costs.
Talking about confirmation bias.
Confirmation bias is the tendency to search for, interpret and favor information in a way that confirms or supports prior beliefs. It can ruin businesses and football teams alike.
If you do this with NFL personnel decisions, and roll with players too long to save face, it’s going to be very hard for your team to be successful.
Some teams might start a player too long, or keep him on the roster too long, based on where he was drafted or how much he makes. Bill Belichick doesn’t roll this way. He doesn’t worry about his draft-record or free agent-record when making roster decisions, He views everyone on the field equally, regardless of how they were acquired, and always keeps and starts the best players.