If former Ultimate Fighting Championship (UFC) heavyweight champion Brock Lesnar is thinking about making his return to mixed martial arts (MMA) in the second half of 2015, he had better think again.

Or face the wrath of Brendan Schaub.

"Doing fake wrestling is not the same as being in the UFC," the struggling Schaub told The Jason Ellis Show (via MMA Digest). "You're playing grab ass, you know if you're gonna win or lose. Yeah, it's hard on your body, great. He hasn't been competing and training like I have. If he comes back to the UFC, I would 100-percent send him packing back to the fake wrestling."

Get in line.

Lesnar retired from combat sports in late 2011 after getting his liver turned inside out by Alistair Overeem. That's right around the same time the current WWE champion was battling diverticulitis. Since then, he's made a full recovery and continues to flirt with the idea of an Octagon return.

That said, how do you feel about Schaub as his first opponent?