BJ Penn has offered to fight Georges St-Pierre at lightweight in Madison Square Garden

We've already seen it play out twice but, for some reason, this is still intriguing to us.

Unfortunately, though, this is realistically never going to come to fruition. Former welterweight champions, two of the greatest pound-for-pound fighters of all time, both coming back from lengthy lay-offs... But it's never going to happen. Georges St-Pierre has officially said "I'm ready" in relation to a return to the Octagon and his suggestions that he could possibly come back at 155 lbs has perked up the cauliflowered ears of a certain former rival. https://twitter.com/SportsJOEdotie/status/745222025476706305 "I'm not a big welterweight," St-Pierre said on last week's edition of The MMA Hour. "I walk around 187 lbs. I'm 186, 187 when I wake up in the morning, and I could easily make it (with) a diet, because a lot of lightweights are bigger than me. Welterweight, I don't even talk about it because most of them are bigger than me, of course, and middleweight, they're much bigger than me. But it's not really about size. It's about skills." St-Pierre has toyed with the idea of a comeback for around a year now but, after putting himself through a successful trial training camp, the welterweight great is closer than ever to fighting for the first time since November 2013. And BJ Penn, who has lost to GSP on two occasions at 170 lbs, has offered up his services for the Canadian's comeback bout. Penn, who was recently pulled from the UFC 199 card after admitting to the use of an IV (a practice outlawed under USADA's rules), took to Twitter on Sunday night to call St-Pierre out for a possible super-fight at UFC 205 in Madison Square Garden. https://twitter.com/bjpenndotcom/status/747272250106097665?ref_src=twsrc%5Etfw It's like we got in a time machine and were sent spiralling back to 2009.