Would Dana White really have BJ Penn in the cage w/ GSP if this fight was not going to happen? A lot of questions will surface in the near future: What weight will the fight take place at and will a title be on the line? The first BJ Penn vs. GSP was a great fight. BJ Penn has always been motivated by revenge. Penn and GSP are clearly two dominant champions in their respected divisions. When this epic fight takes place, it could go down as one of the greatest fights of all time.