Pic: UFC Fight Night 58 poster first-look for 'Machida vs. Dollaway' on Dec. 20 in Brazil

Ultimate Fighting Championship (UFC) is sorting out the middleweight rankings (see them here) at the upcoming UFC Fight Night 58 mixed martial arts (MMA) event on FOX Sports 1, which takes place at Jose Correa Arena in Barueri, Sao Paulo, Brazil, on Dec. 20, 2014.

To that end, former champion Lyoto Machida will try to get back into the 185-pound title hunt against streaking division standout and former Ultimate Fighter (TUF) finalist CB Dollaway, in a five-round main event that is likely to produce a finish.

But from which combatant?

In the co-main event. former bantamweight titleholder Renan Barao looks to prove he can still make weight hang with the best of them in a 135-pound slugfest opposite streaking Canadian stalwart Mitch Gagnon. Can Brazil work its way back into championship relevance?

Time will tell.

See the latest and greatest UFC Fight Night 58: "Machida vs. Dollaway" fight card and rumors right here.