The ability to admit mistakes is an important trait to have, in football and in life.
NFL teams that recognize early on when a free-agent signing or draft pick has gone wrong, and move quickly to rectify their error, tend to do better than those who wait and hope for a miraculous turnaround.
Bob Quinn, not quite 20 months into his job as general manager, has shown the willingness to move on from his mistakes.
The Detroit Lions haven't had any high-profile misses in Quinn's tenure as GM. But to his credit, Quinn hasn't been obstinate when it comes to keeping some of the veteran free agents and even rookie draft picks he's brought in.