The San Francisco 49ers’ main starting quarterback is Brock Purdy, with Mac Jones serving as his backup and spot starter when Purdy is injured.

Current 49ers quarterback

  • Brock Purdy is the 49ers’ primary starting quarterback , having emerged as the team’s franchise QB after taking over during the 2022 season and leading deep playoff runs, including a Super Bowl appearance.
  • Team and league coverage in 2025 continue to describe Purdy as San Francisco’s long-term starter when healthy.

Game-by-game starter context

  • In the 2025 season, injuries to Purdy’s toe and shoulder have forced him to miss multiple games, creating short-term changes at the starting QB spot.
  • During these stretches, Mac Jones has started and remains undefeated in his starts for San Francisco, but reports still label Purdy as the starter once he is fully healthy.

Simple takeaway

  • If you’re asking “who is the 49ers quarterback” in a general sense, the answer is Brock Purdy as the franchise and primary starter.
  • If you are asking who starts today or in specific injured weeks, Mac Jones may be the one under center when Purdy is ruled out.

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