He came back nearly two hours later, but tipped the scales 90 grams over the limit and while he had a few minutes left to shed the surplus, opted not to weigh in again.
Khabib Nurmagomedov was McGregor's intended target, but the UFC star ended up injuring two other fighters and a UFC employee during the incident.
Romero was given two hours to make the weight and according to Romero and his manager, the two hours were cut short.
No title fight for the main event but talks are ongoing about salvaging the fight.
Those words make it seem like the bout is a certainty to take place, although it remains uncertain what terms the champion's camp is looking for as compensation for Romero's miss.
Ferrari under fire for confusing Toronto skyline for Montreal
Even a member of the city Council of Toronto could not resist and took part in the action, writing: " Montreal looks familiar...". Ferrari's Kimi Raikkonen was 0.13 seconds slower, followed by Verstappen's Red Bull teammate and Monaco victor Daniel Ricciardo .
Mayweather Becomes Highest-Paid Athlete With $275m A Night
The 41-year-old also earned $10 million (R127 771 400, 00) from endorsement deals with companies like Hublot and Tequila Avion. The latest list features athletes from 11 different sports, with basketball leading the way with 40 contenders.
Real gator watches while boy uses inflatable gator
Behind a brown chair to the right of the picture, a real alligator can be seen sizing up the situation. 'They say they are afraid. Mojica lives in Lake Nona and made the post on her Facebook page public to spread awareness of how alligators can be anywhere.
As a result, New Zealand-fighter Whittaker will have to wait to defend his title after last fighting nearly a year ago in July. He blames the commission for telling him to stop cutting weight when he still had time remaining. The hulking 41-year-old initially missed weight by one full pound on his first try but was given two hours to cut the last weight by the IL athletic commission.
"I think you do have to get on with it and move on, that's the inevitable outcome", Whittaker told ESPN.
Take a look at the rest of the night's big-name staredowns.
Heavyweight legend and former UFC champion, Andrei Arlovski vs rising prospect, Tai Tuivasa.
Australian Megan Anderson and her featherweight opponent - former bantamweight world champion Holly Holm - each logged the same weight.
Returning top flyweight contender, Joseph Benavidez vs Sergio Pettis.