Hall of Fame coach Bill Walsh was once asked to pick the five most important positions on a team. His first choice was a quarterback as "You need a person who can engineer and who can manage the team," stated Walsh. "Sometimes his athletic ability isn't as important in the early stages of developing a team. It is to manage it well, with the least amount of error and allowing the team to perform smoothly."
The quarterback position is so important to a team's success, that the St. Louis Rams just traded away the 15th overall pick, two second round picks (43 and 45), their 3rd round pick (76), and 2017 first and third round picks in a blockbuster trade to acquire the number one overall pick in the 2016 NFL Draft.