One-time UFC light heavyweight championship challenger Jeremy Horn submitted Joe Trujillo with a first-round keylock in the Rocky Mountain Nationals “Stars of MMA” main event on Friday at the National Western Complex in Denver. The end came 2:52 into the opening period.

The 34-year-old Horn, one of the world’s most experienced and respected mixed martial artists, has delivered three straight wins since losses to Nate Marquardt, Dean Lister and Rousimar Palhares inside the UFC Octagon. The submission victory was the 52nd of his 13-year career. Horn worked a number of attempted finishes on Trujillo before he put him away with the keylock.

Wallhead Wins Sixth Straight

Jim Wallhead defeated “The Ultimate Fighter” Season 9 alumnus Che Mills by unanimous decision in the featured bout at Knuckle Up MMA 3 “Mills vs. Wallhead” on Sunday at the Celtic Manor in Newport, Wales.

A Team Rough House stablemate of UFC welterweight contenders Dan Hardy and Paul Daley, Wallhead has won six consecutive fights and seems poised for a breakthrough with a more prominent promotion. He overcame Mills -- a man who has twice finished reigning Dream welterweight champion Marius Zaromskis -- with a heavy dose of takedowns and strong clinch work.

Mills, a former Cage Rage champion, saw his nine-fight unbeaten streak grind to a disappointing halt, as he tasted defeat for the first time in nearly six years.

Downey Rights Ship

UFC veteran Derek Downey posted a unanimous decision against Craig Kaufman in the Jeremy Horn’s Elite Fight Night 11 headliner on Friday at the Davis Conference Center in Layton, Utah.

Cut by the UFC following his submission loss to Nick Catone in February, Downey has won four of his past five fights. A Horn protégé who tried out for “The Ultimate Fighter” reality series, Downey holds a pair of victories against UFC castoff Brandon Melendez. His win over Kaufman was his first to go the distance.

Saraiva Decisions Mix

UFC veteran and one-time Palace Fighting Championship lightweight titleholder Diego Saraiva edged Jonathan Mix by split decision in the marquee matchup at Wild Bill’s Fight Night 23 on Friday at Wild Bill’s Atlanta in Duluth, Ga.

A Nova Uniao Brazilian jiu-jitsu black belt, Saraiva has rattled off back-to-back wins since he dropped a unanimous decision to current interim World Extreme Cagefighting lightweight champion Benson Henderson in October 2008. The Atlanta-based 27-year-old has delivered 11 of his 14 career wins by submission and has yet to be finished as a professional.

Saraiva will lock horns with Eddie Yagin at Tachi Palace Fights 2 on Dec. 3 at the Tachi Palace Hotel and Casino in Lemoore, Calif.