Dana White Questions If Conor McGregor Is on Drugs After Crashing Media Day

Conor McGregor has helped make the UFC a lot of money through the years, but after an out-of-control incident on Thursday, UFC President Dana White is not pleased with the star fighter. 

The 29-year-old crashed UFC 223 media day at the Barclays Center in Brooklyn on Thursday, going so far as to attack a bus:

Footage from inside of the bus was posted (and since deleted) by Emil Grzelak (Video contains NSFW language):

"

Conor McGregor defo going to jail in USA after this. Insane footage from inside bus. Guy split open Via @emilgrzelak pic.twitter.com/lg8ZCwFk7Y

— Niall Harbison (@NiallHarbison) April 5, 2018"

As a result of the incident, White wondered whether or not McGregor may be on drugs, via ESPN's Brett Okamoto (Video contains NSFW language):

The shocking outburst led to Michael Chiesa needing a trip to the hospital after suffering a laceration to his face. Per Ariel Helwani of MMAFighting.com, the injury will not keep Chiesa from fighting this weekend.

White, per Okamoto, would go on to call McGregor's attack "the most despicable thing in UFC history." He also said Artem Lobov has been pulled from Saturday's card after being part of the group that started the altercation.

As unbelievable as Thursday's events were, the Irish star is no stranger to controversy. He routinely grabbed headlines during last year's promotional tour for the McGregor-Mayweather boxing match, taking personal shots at Floyd Mayweather as well as being accused of racism.

There is no question the impact McGregor can make on the business side of things for the UFC. However, the sport can't have its fighters going after each other outside of the Octagon—and causing injuries, no less.

McGregor has some explaining to do, as White wants to know what in the world led to an ugly day for the UFC.