who has conor mcgregor lost to

February 18, 2026

Conor McGregor has lost to six opponents in professional MMA, plus once in professional boxing.

All MMA opponents McGregor has lost to

Here are the fighters who have defeated Conor McGregor in professional mixed martial arts:

Artemij Sitenkov – McGregor’s first pro loss, via kneebar submission at Cage of Truth 3 in 2008.

Joseph Duffy – Submitted McGregor via arm-triangle choke at Cage Warriors 39 in 2010.

Nate Diaz – Submitted McGregor by rear‑naked choke at UFC 196 in 2016 (his first UFC loss).

Khabib Nurmagomedov – Submitted McGregor at UFC 229 in 2018 to retain the UFC lightweight title.

Dustin Poirier – Defeated McGregor by KO/TKO at UFC 257 in January 2021.

Dustin Poirier (again) – Beat McGregor by TKO (doctor stoppage after McGregor’s leg break) at UFC 264 in July 2021.

So his MMA record is 22–6 , with four of those losses coming in the UFC.

Boxing loss

In professional boxing, McGregor has one high‑profile loss:

Floyd Mayweather Jr. – McGregor lost by TKO in the 10th round in his boxing debut in 2017.

That makes 7 total losses in major professional combat sports (6 in MMA, 1 in boxing).

Quick HTML table of his MMA losses

html

<table>
  <thead>
    <tr>
      <th>Opponent</th>
      <th>Sport</th>
      <th>Event / Promotion</th>
      <th>Year</th>
      <th>Result method</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td>Artemij Sitenkov</td>
      <td>MMA</td>
      <td>Cage of Truth 3</td>
      <td>2008</td>
      <td>Submission (kneebar)</td>
    </tr>
    <tr>
      <td>Joseph Duffy</td>
      <td>MMA</td>
      <td>Cage Warriors 39</td>
      <td>2010</td>
      <td>Submission (arm‑triangle choke)</td>
    </tr>
    <tr>
      <td>Nate Diaz</td>
      <td>MMA</td>
      <td>UFC 196</td>
      <td>2016</td>
      <td>Submission (rear‑naked choke)</td>
    </tr>
    <tr>
      <td>Khabib Nurmagomedov</td>
      <td>MMA</td>
      <td>UFC 229</td>
      <td>2018</td>
      <td>Submission</td>
    </tr>
    <tr>
      <td>Dustin Poirier</td>
      <td>MMA</td>
      <td>UFC 257</td>
      <td>2021</td>
      <td>TKO / KO</td>
    </tr>
    <tr>
      <td>Dustin Poirier</td>
      <td>MMA</td>
      <td>UFC 264</td>
      <td>2021</td>
      <td>TKO (doctor stoppage, leg injury)</td>
    </tr>
  </tbody>
</table>

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