The QB is the only position in football that’s given a W/L record because that position influences the outcome of games more than any other position. Pro football reference provides a list of QBs W/L records. It isn’t me that saying a W/L record is a QB stat, practically every football publication provides a QBs W/L record. Head coaches are also given a W/L record and are judged by them. Pitchers in baseball are given a W/L record but it doesn’t mean they’re doing it all by themselves. It takes an entire team to win a game but the play of your QB can make the difference between winning and losing. Most of the Super Bowl MVPs and league MVPs have been QBs. Romo and Dak aren’t the reasons the Cowboys haven’t gotten over the hump. Have they played a role? Of course but the biggest problems have been the coaching and the defense. A QB can only control so much. This is from Google.
“In the NFL, the starting quarterback is the only position that is credited with records of wins and losses. Tom Brady holds the record for the most regular season wins with 243. Otto Graham holds the record for the highest winning percentage with a minimum of 50 starts at . 814 (57–13–1).”