By Francisco Salazar

Carlos Negron was more suspect than prospect entering his 10 round bout against Derric Rossy Saturday night. Negron's knockout victory over Rossy might turn some heads.

Negron dropped the heavyweight gatekeeper twice before the fight was stopped in round four at Freedom Hall in Louisville, Kentucky.

With the win, Negron goes to 20-1, with 16 KOs. Rossy, who hails from Medford, N.Y., drops to 31-13, with 15 KOs.

Negron entered the fight Saturday night having won six in a row, all by knockout, since losing to Epifanio Mendoza in September of 2011. The 29-year-old Negron weighed 238 pound at Friday's weigh-in, more than 40 pounds heavier than in his previous fight on December 19.

Rossy entered his fight against Negron having lost four of his previous six bouts. Despite recent losses to Vyacheslav Glazkov, Trevor Bryan, and Bermane Stiverne, Rossy scored wins over Joe Hanks and Axror Muralimov.

Negron had a three-inch height advantage over Rossy, alloying him to rain punches down onto Rossy. Undaunted, Rossy used his athleticism to score over the slower Negron, stunning his opponent in the opening round.

Near the end of the second round, Negron dropped Rossy with a right hand to the head. Despite being down early in the fight, Rossy was able to remain competitive with Negron. Rossy kept Negron honest by landing his own right hands to the head and body.

The rally was short-lived though, as Rossy stunned Rossy in round, eventually dropping almost midway through the fourth round. Rossy was able to get up and attempted to fight back, but was receiving a lot of punishment as he had his back against the ropes, prompting referee Marvin Whittamore to stop the fight at 1:55.

In the co-feature bout, featherweight Toka Kahn Clary won a one-sided decision over Angel Luna (11-3-1, with 6 KOs) .

The southpaw Kahn Clary utilized his skills to outbox Luna throughout the fight. Luna would charge forward, but Khan Clary was able to side-step and counter Luna.

Kahn Clary solidified his win Saturday night with a knockdown late in round seven, courtesy of a short right hook to the head.

Scores were 80-72, 80-72, and 79-73 for Kahn Clary, who improves to 22-1, with 15 KOs.

In a battle of unbeaten welterweights, Peter Dobson won a hard-fought eight round majority decision over Jeremy Nichols (7-1-1, with 2 KOs). One judge scored the bout 76-76, while the other two judges scored the bout 77-76 in favor of Dobson, who improves to 9-0, with 5 KOs.

Junior middleweight Steven Martinez (18-3, with 13 KOs) won an eight round majority decision over Anthony Lenk (14-4, with 7 KOs). One judge scored the bout 76-76, while the other two judges scored the bout 77-75 and 78-74 for Martinez.

All four bouts were part of a CBS Sports Network broadcast.

Saturday night marked the debut of Evander Holyfield as a promoter. Holyfield's promotional company is called Real Deal Boxing.

Francisco A. Salazar has written for Boxingscene.com since September of 2012 and has covered boxing in Southern California and abroad since 2000. Francisco also covers boxing for the Ventura County (Calif.) Star newspaper, RingTV.com, and Knockout Nation. He can be reached by email at santio89@yahoo.com or on Twitter at FSalazarBoxing