In the main event of the evening flyweight kingpin, Demetrious Johnson, defended his title against unlikely challenger, Chris Cariaso. Johnson is the first and only flyweight champion in UFC history and made the fifth successful defense of the gold. Johnson was one of the top contenders for fighter of year last year and followed that great year up with a dominating performance over Ali Bagautinov in June. Cariaso wasn’t the obvious choice for this shot, but with John Dodson injured, Cariaso got a golden opportunity. Cariaso had won three straight bouts over the past year. The forever underrated Cariaso has been in the cage with the best in the world with his only four losses under the Zuffa banner coming to Renan Barao, John Moraga, Jussier da Silva, and Michael McDonald.

In the night’s co-main event Bellator lightweight champion, Eddie Alvarez finally made his UFC debut against Donald Cerrone. Alvarez came over to the UFC after vacating the Bellator title. After years of contract litigation and wars with Michael Chandler, the Philadelphia native finally made his first octagon appearance. Cerrone could finally be on the verge of a UFC title shot. “Cowboy” had won four straight and has finished every last one of those opponents.

This is a rare event where there really is a second co-main event worthy fight as Dustin Porier faced Conor McGregor in a featherweight grudge match. The trash talk has been heavy between the Louisiana native, Porier, and the Irishman, McGregor. The outspoken McGregor is undefeated in his first three octagon showings and has quickly vaulted up the rankings due to his brash personality. Porier is certainly McGregor’s toughest test to date and could certainly be the perfect foil. Porier had won three straight since dropping a decision to Cub Swanson in February of 2013. “The Diamond” came into this one with two straight knockouts over Diego Brandao and Akira Corassani.

From top to bottom this card is was stacked. Under those top three bouts we saw a middleweight contender’s matchup between Tim Kennedy and Yoel Romero and the return of Cat Zingano against Amanda Nunes. If that all wasn’t enough, the preliminary portion of the card was headlined by former bantamweight champion, Dominick Cruz, returning from a three-year layoff to face Takeya Mizugaki.

The action kicked off with two preliminary bouts on UFC Fight Pass at 7 p.m. ET. Those were followed up by four more preliminary bouts on Fox Sports 1 at 8 p.m. ET. The main card finally got going at the traditional starting time of 10 p.m. ET live on pay-per-view.

Above is video of Conor McGregor’s post-fight interview. (video is courtesy of the UFC)