Jon Jones has put considerable muscle gain, Jon Jones took to Instagram to display off his new build as he prepares to make the jump to the UFC heavyweight division.

The 33-year-old abandoned his title in the light heavyweight division to move up a weight class.

Jon Jones had last fought in February of 2020, when he won a close decision against Dominick Reyes.

The former champion has efficiently vacant out the division since winning the belt back in 2011 against Maurício Rua.

None the less arch-rival Daniel Cormier retiring from active-competition, Jon Jones move up to heavyweight throws up interesting matchups. An Israel Adesanya fight also exists in the periphery, should Jones be interested in moving back down to 205 pounds. Looking at his current physique, though, that seems unlikely.