The Buffalo Bills and general manager Brandon Beane consistently have extra offensive line depth. Beane stockpiles a mixture of younger players and veterans, most of whom have plenty of versatility and/or starting experience, to ensure that the team has a strong group even beyond its starting five.
Beane often pulls off some wizardry at the end of the preseason, flipping some of those linemen for late-round draft choices. While that might not seem like great strategy (and might not always work, as seen by the Wyatt Teller trade), it does give the team the necessary ammo to move up in the middle rounds of the NFL Draft.