The propensity to stick with a quarterback too long isn’t just an anecdotal phenomenon favored by frustrated fans sick of losing with the same players. It has backing in research and hinges on the basic economic concept of sunk costs—the idea that money spent can’t be recovered. Typically, the more teams invest in a player, the more they’ll let him play.
Except for the Houston Texans, who have replaced their starter with Deshaun Watson, and now have one of the league's best offenses:
How the Texans reached this position—with an eagerness to look for a better option at quarterback at any given moment—sounds obvious. But it’s borderline radical in a league where coaches and executives attach themselves to their most prized investments with feverish devotion.
Some of the reluctance to ignore sunk costs is that management has to admit that they made an earlier mistake.