The “Twelves” (often written as “12s”) are the Seattle Seahawks’ fanbase — they’re considered the team’s unofficial extra player on the field, inspired by the idea of a “12th man” in football where 11 players are allowed per side.

What “the Twelves” means

  • The 12s are the Seahawks’ loud, passionate fans whose noise is seen as giving Seattle a real home‑field advantage, almost like having an extra player in the game.
  • The team describes them as giving the Seahawks a “12 on 11 advantage every play,” thanks to their constant and intense support.

Why the number 12 is special

  • The number 12 jersey was officially retired by the Seahawks in 1984 in honor of their fans, making it a symbolic number that belongs to the 12s rather than to any individual player.
  • Because of that, you won’t see a current Seahawk wearing 12 on the field; the number stands for the fanbase itself. One backup quarterback, Sam Adkins, was the only Seahawk to wear 12 before it was retired.

Traditions and game‑day impact

  • Before every home game at Lumen Field, the team raises the “12 flag” to hype up the crowd and recognize the 12s, turning it into a ritual that signals the fans’ role in the game.
  • The 12s are famous for being so loud that they’ve caused multiple opponent false starts and even registered seismic activity during big moments like the “Beast Quake” run, reinforcing their reputation as a real competitive weapon.

In short, when people talk about “the Twelves” for the Seahawks, they’re talking about the fans — a named, honored part of the team’s identity and game‑day strategy.

TL;DR: The Twelves are the Seahawks’ fans, symbolized by the retired number 12 jersey and known for creating one of the loudest, most intimidating home‑field environments in the NFL.

Information gathered from public forums or data available on the internet and portrayed here.