Mike Gundy was Oklahoma State’s head coach for 21 seasons, from 2005 until he was fired in September 2025.

Quick Scoop: How long has Mike Gundy been at OSU?

If you’re asking “how long has Mike Gundy been at OSU,” there are really two angles:

  • As head coach :
    • Took over the Oklahoma State Cowboys program in 2005.
* Was let go in late September 2025, three games into his 21st season.
* That’s about 20 full seasons plus the start of a 21st.
  • As a lifer at OSU (player + coach):
    • Played quarterback at OSU from 1986–1989.
* Later joined the coaching staff, then became head coach in 2005 and stayed in that role until 2025.
* So his connection to OSU football spans nearly four decades.

Why people are talking about it

  • He became the winningest coach in school history, with a 170–90 record and 12 bowl wins.
  • OSU parted ways with him after a rough stretch: 3–9 in 2024 (0–9 in Big 12 play) and a 1–2 start in 2025.
  • His firing in September 2025 ended one of the longest continuous coaching runs at a single Power conference school.

Mini timeline

  1. 1986–1989 – OSU starting QB.
  1. 1990s–early 2000s – Assistant coach roles (including at OSU), then returns.
  1. 2005 – Named Oklahoma State head coach.
  1. 2010–2017 – Peak run with consistent high-win seasons and national relevance.
  1. 2021 – 12-win season and Fiesta Bowl win.
  1. 2024–2025 – Performance collapses, leading to his dismissal in Sept. 2025.

So if someone on a forum asks, “how long has Mike Gundy been at OSU?”, the clean answer is:
He was OSU’s head coach for 21 seasons (2005–2025), and he’s been connected to the program in some role since the late 1980s.

TL;DR:

  • Head coach at OSU: 2005–Sept. 2025 (21st season).
  • Total OSU ties (player + coach): from 1986 into 2025, nearly 40 years.

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