The former UFC lightweight and welterweight champ even has an opponent and date in mind: lightweight Nik Lentz on March 5 at UFC 197.
"This is a formal challenge for Nik Lentz to meet me in the octagon March 5th in Las Vegas," Penn wrote in the post.
I ask you today to be a man and back up everything you said, talk the talk [and] walk the walk, uncle BJ is mad already."The 37-year-old Penn (16-10-2) took an extended hiatus from the sport in 2012 and then came back in 2014 to face Frankie Edgar as a featherweight.
Those rumors of BJ Penn's return to MMA just became a lot more than rumors.
On Wednesday afternoon, Penn posted a message and photo on his Instagram account that pledged a return to the UFC.
It was all about the return of the legend last evening as BJ Penn stepped foot inside the UFC Octagon for the first time since 2014 to take on the upcoming Mexican prospect, Yair Rodriguez at UFC Fight Night 103 in Phoenix, Arizona.
Penn’s last performance against Frankie Edgar in 2014 inspired little confidence for a comeback and few gave him a chance of winning before heading into the Octagon last evening.
After taking a one-sided beating that ended in a third-round TKO defeat, Penn formally retired from MMA. The challenge comes just a day after another Penn Instagram post first inflamed speculation of a comeback.