B.J. Penn returns to the UFC for the first time since October 2011, when he dropped a decision to Nick Diaz.
After that fight, his future was up in the air, and it looked like it may be the end for one of the legends in the sport.
However, Penn is not quite done.
He returns for a marquee matchup against Rory MacDonald.
If Penn can return and knock off the much-hyped MacDonald, he can put his name back at the top of cards. It will not be an easy task, but UFC on FOX is the perfect platform to relaunch his career.
Here are five questions we have about the former lightweight and welterweight champion.