Tonight at 9 p.m. EST on NBC Sports (formerly the Versus network), Main Events presents a triple-header of fights in their much-hyped first show on the network, the first of four guaranteed dates in 2012.

The show was originally scheduled to be headlined by heavyweight contender and former world title challenger Eddie Chambers taking on ex-titleholder Siarhei Liakhovich, but that fell through when Chambers pulled out due to injury (something that didn't sit well with Liakhovich to say the least).

Instead, Philadelphia prospects Bryant Jennings (11-0, 5 KO) and Maurice Byarm (13-0-1, 9 KO) have been drafted for a shot at hopefully major exposure. Both men have yet to face a legitimate test in their careers, and this is a big fight for each of them.

But the real heat is likely to come from the co-feature, pitting junior middleweights Gabriel Rosado (18-5, 10 KO) and Jesus Soto Karass (24-6-3, 16 KO). Rosado, another Philly fighter, will have home field advantage in this one, and is a known spoiler whose career hasn't been protected, and frankly he's one of those guys who was really not supposed to get as good as he's become.

But Soto Karass, 29, has the edge in experience, and has been featured on major cards in the past. He faced Alfonso Gomez (L-TD-6) on the Pacquiao vs Cotto card, and returned the next November on another Pacquiao show, facing Mike Jones (L-MD-10) in an exciting fight on the Pacquiao vs Margarito card. Soto Karass, like Rosado, is a tough battler whose grit outweights his talent. This one shapes up to be a very entertaining fight.

The opening bout is a six-round light heavyweight contest between Cuban Sullivan Barrera (8-0, 6 KO) and Toledo's Damar Singleton (8-0, 4 KO).