Bo Nix is not playing because he suffered a broken/fractured bone in his right ankle and is undergoing season‑ending surgery, which has ruled him out for the rest of the Broncos’ playoff run.

Quick Scoop: What Happened?

  • Bo Nix injured his right ankle on the second‑to‑last play of the Broncos’ overtime win against the Buffalo Bills in the divisional round of the 2025 NFL playoffs.
  • Imaging after the game revealed a fracture, and head coach Sean Payton announced that Nix would miss the remainder of the postseason.
  • Nix is scheduled to have surgery, which effectively ends his season and explains why he is not playing in upcoming games, including the AFC Championship.

Who’s Replacing Him?

  • With Nix out, backup quarterback Jarrett Stidham has been named the starter for the AFC Championship Game and any further playoff games if Denver advances.
  • Coaches have publicly expressed confidence in Stidham’s ability to step in, calling him ready and capable of starting for multiple teams.

Context & Timeline

  • The injury occurred during a thriller: Denver’s 33–30 overtime victory, which was the Broncos’ first playoff win since Super Bowl 50.
  • Nix actually finished the game despite the fracture, posting strong passing numbers and leading the team in rushing attempts before the severity of the injury was confirmed.

Forum / Discussion Angle

In fan forums and discussions, most of the conversation around “why is Bo Nix not playing” centers on:

  • Frustration that a breakout playoff run is now missing its starting QB due to a freak late‑game injury.
  • Curiosity about how effective the Broncos’ offense will be with Stidham and whether the team can maintain momentum without Nix under center.

In short, the answer to “why is Bo Nix not playing” is: a season‑ending fractured ankle that required surgery, taking him out of action right as the Broncos entered the biggest games of their season.

TL;DR: Bo Nix isn’t playing because he fractured a bone in his right ankle late in the playoff win over the Bills and is now out for the rest of the season after scheduled surgery.

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