Conor McGregor is scheduled to fight in the main event of UFC 200 on July 9, but the competitive future of the Irish star appears to be in serious doubt. The featherweight champ posted an odd Twitter message on Tuesday morning indicating that he has retired.

Considering his popularity and the fact that he’s set to headline the biggest pay-per-view in UFC history, there has been much speculation that McGregor isn’t actually done fighting. It’s possible that McGregor could be looking to bring some more attention to his fight, but some are adding credibilty to the notion that his career might be over, at least for now.

After suffering his first ever loss in UFC to Nate Diaz at UFC 196 in March, McGregor lobbied for a rematch and was soon granted one. Even if he actually does want to retire, there’s plenty of time for McGregor to change his mind. The 27-year-old has a 19-3 record, and remains a major pay-per-view draw.

Jon Jones, arguably the most accomplished active fighter in UFC, will headline UFC 197 on Saturday, and there are still three PPV’s remaining before McGregor is scheduled to fight again.