Jon Jones spent his entire career in the light heavyweight division, but, not anymore ... the UFC legend is now a heavyweight, and we're seeing JJ's physique for the first time!
35-year-old Jones posed for promotional photos on March 1 ahead of his UFC 285 fight with 32-year-old former interim champ Ciryl Gane ... and you can clearly see 6'4" Jon packed on some serious size.
Jones systematically bulked up, adding muscle over the last 2+ years. When his fight with Alexander Gustafsson was inducted into the UFC Hall of Fame last fall, Jon told the crowd he weighed 255 lbs.
It's unclear how much he tips the scales at now, but Jon previously stated he was aiming to weigh 270 lbs. heading into fight week, before cutting a few pounds to make the heavyweight limit of 265 lbs.
FYI, Jones weighed 204 lbs. for his last fight against Dominick Reyes ... which he won by unanimous decision.
Of course, Jones is the greatest LHW (205 lb.) fighter to ever step foot in an MMA cage ... but, there's a reason weight classes exist. Size matters, despite what you've heard.
As for his opponent, Gane is a bonafide heavyweight. He's 6'5", and weighed 247 lbs. for his last fight against Tai Tuivasa.
There's a good chance Jon's the bigger fighter when the men meet in the Octagon in just two days.