When Jon Jones steps into the cage Saturday at UFC 309 , it’ll mark more than 16 years that he’s competed as a professional fighter. The UFC snagged him within his first year of competition. He fought six times regionally before the promotion came calling. All eight of those bouts occurred between April and July 2008. One of those fights was against fellow future UFC fighter Parker Porter in Wilmington, Mass., for World Championship Fighting (now Combat FC). Jones, then 20, would sign with the UFC one win later.