“Sexi Mexi” knows he messed up.
Ultimate Fighting Championship (UFC) Bantamweight veteran John Castaneda suffered a split-decision loss to China’s Alatengheili on the UFC Vegas 121 “Prelims” this past weekend (Sat., Sept. 26, 2026) inside Meta Apex in Las Vegas, Nevada.
The fight was extremely competitive and difficult to score. Castaneda appeared to secure the opening round, while Alatengheili clearly claimed the third. That left the second round as the deciding frame, with Alatengheili landing at a higher
volume but Castaneda connecting with the more damaging shots.
The judges ultimately sided with Alatengheili, leaving some frustrated fans to brand the result a robbery.
Castaneda, however, is not blaming the judges.
In a lengthy Instagram statement, the 10-fight UFC veteran accepted full responsibility for believing he was ahead and taking his foot off the gas during the most important round of his career.
“Saturday night didn’t go my way.
This sport has a way of giving you exactly what you need, even when it isn’t what you wanted. I prepared well, I believed in myself, and I stepped in there ready to compete. The result is mine to own.
What disappoints me most is knowing that I took the easy way out when I believed I was up two rounds to zero. Instead of continuing to fight with the urgency and intent that got me there, I allowed myself to get comfortable and tried to protect what I thought I had already earned. Comfortability BREEDS complacency.
I played possum in probably the most important third round of my career. I consciously made the decision to play it safe because I thought I had secured the win, and that decision cost me everything. At this level, you can’t assume anything, you can’t coast, and you can’t leave your fate in anyone else’s hands. I paid the ultimate price for that lesson Saturday night, and it’s one I’ll carry with me for the rest of my career.
I’ve been doing this long enough to understand that one night doesn’t define the work, the growth, or the person behind it. Wins deserve to be appreciated, and losses deserve to be learned from.
I’ll take some time, reflect, and see what’s next for me.
Grateful for the opportunity. Proud to represent the people in my corner. Most importantly, I’m healthy, I’m surrounded by people I love, and my faith in God remains bigger than any win or loss. There’s a lot to be grateful for.”
Castaneda’s decision to coast could ultimately prove extremely costly.
The 33-year-old is now winless in four consecutive appearances, recording three losses and one draw since defeating Kyung Ho Kang on Nov. 11, 2023.
That puts Castaneda in a dangerous position as UFC continues trimming its roster to make room for its latest crop of Contender Series signings. The close and controversial nature of Saturday’s loss could help his case, but nothing is guaranteed after nearly three years without a victory.
If UFC gives Castaneda another opportunity, he has already learned the lesson: never trust the scorecards—and never take the easy way out.
For complete UFC Vegas 121 results and play-by-play click here.
