Longtime mixed martial arts (MMA) veteran Roan Carneiro accomplished one of the most difficult feats in all of combat sports, and that's beat three men in one night en route to capturing the BattleGrounds MMA welterweight tournament last Friday night (Oct. 3, 2014) in Tulsa, Oklahoma.

The prize? A whopping $50,000.

That may sound like chicken feed for Ultimate Fighting Championship (UFC) President Dana White, who probably spends that much on one hand of blackjack, but for a regional promotion with no bankable stars, that's about as good as you're going to get.

Which makes the fact that Carneiro was "robbed" (via MMA Torch) all the more painful.

Oklahoma commission took $15,000 from @jucao saying he was "late" for a physical. They robbed him! We are fighting this! — Douglas Lima (@PhenomLima) October 4, 2014

And from the man himself:

@johnalessio79 they stole my money man. I am really disappointed about that whole crap!!! — Roan Jucao (@jucao) October 4, 2014

The Oklahoma Athletic Commission could not be reached for comment (its carrier pigeon doesn't work weekends).

Carneiro captured the eight-man tournament by defeating Randall Wallace (submission), Trey Houston (technical knockout), and Brock Larson (unanimous decision). The Brazilian at one time was competing under the ZUFFA banner, but left the promotion in late 2008 after a dismal 2-3 run.

But as this fighter proved just last night, you can always go home again.

For complete results from the BattleGrounds MMA O.N.E. tournament -- including the pay-per-view (PPV) "super fights" click here. For our post-fight recap and final thoughts click here.