In the immediate aftermath of UFC 329, the air at T-Mobile Arena felt heavy with the kind of collective disbelief that only the fight game can generate.

Conor McGregor's return to the UFC's Octagon lasted all of 69 seconds before a knee injury brought a premature end to the fight. Here's everything you need to know.

Conor McGregor’s return against Max Holloway at UFC 329 ended at just 1:09 of the first round Saturday night because of a knee injury.