Conor McGregor tweeted vaguelly and suddenly about retirement Tuesday. The UFC featherweight champion is slated to face Nate Diaz in the main event of UFC 200 on July 9 in Las Vegas.

While many were understandably skeptical about “The Notorious” one’s announcement, McGregor’s coach John Kavanagh seemed to double down on his star pupil’s odd announcement.

Ariel Helwani of MMA Fighting reported on the story, stating that while skepticism is to be understood, this may be a legitimate situation.

“Multiple sources are adamant at this time that McGregor’s tweet isn’t a joke, troll job or hoax of any kind. Reason(s) behind it is unclear.”

McGregor’s scheduled opponent also replied to the news:

PWP will have more on this story as soon as it’s available.