Roman Dolidze is fighting this weekend so it's inspired me to make this list, but I'm going to make a few rules first too. Also, this is just for fun, I respect all the fighters on here of course.
1: One fighter per weight class, otherwise it'd all be Heavyweights.
2: No "washed up" fighters, because that's obvious. I'm looking for guys who are, and have always been, not very good.
3: No Women's MMA
With that being said, here are the 5 worst fighters who are ranked right now, not in order, just in general.
5 - Montel Jackson: Jackson is probably on the worst six-fight win streak in the UFC right now. His only good win in the last five years is Da'Mon Blackshear. He's ranked, but honestly I don't think he beats anyone ranked at BW, and there are a lot of unranked guys who I think beat him too. He's not bad, I just think he'd get smoked by a Marcus McGhee or an Aiemann Zahabi type of guy.
4 - Alonzo Menifield: Menifield is a weird one because he shows glimpses of being a good fighter but then just looks terrible whenever he fights someone who's actually good. He's a very fringe ranked guy, but probably loses to everyone ranked at 205 right now.
3 - Daniel Rodriguez: D-Rod is a great guy so I don't want to bully him too much, but he's just not ranked calibre. I will never understand how he beat Holland, but he does not beat a single ranked fighter right now. There are unranked fighters, like Wonderboy for example, who would absolutely smoke him. But he's tough, he's gritty... that's about it.
2 - Tai Tuivasa: It's a shame, but Tai Tuivasa has one good win in his entire MMA career and it's Derrick Lewis. Everyone loved his win streak from 2020–2022, but aside from Lewis none of those wins have aged well. Tai is still 32 but seems disinterested in fighting again (sheer size of the lad now), so I wouldn't say he's "washed," I would just say beating Lewis threw him into the deep end, and then he was faced with actual ranked contenders.
1 - Roman Dolidze is so bad it's funny. It's so funny. I laugh watching his fights. It's so, so, so funny. His boxing is so bad, his kickboxing is even worse, his cardio is so average, chin is about average too. He got embarrassed fighting Imavov and aside from that has been given matchups that highly favor him. His wrestling and definitely his BJJ is easily his best skill, but he rarely uses it because, shock horror, his fight IQ is terrible too. How did he not finish Anthony Smith? How did he go life-and-death with Marvin Vettori TWO TIMES? Comical.
Honourable Mention: Gabriel Bonfim