The World Series of Fighting's third promotional effort is shaping up in short order.

The company already announced the main event for the June 14 event at the Joint at the Hard Rock Hotel in Las Vegas, as Jon Fitch makes his WSOF debut against Josh Burkman. And Monday, MMAFighting.com broke the news of kickboxing superstar Tyrone Spong's second pro mixed martial arts bout, against 11-2 Angel DeAnda.

Tuesday, the promotion announced the remaining two fights on the four-fight NBC Sports Network main card and a pair of preliminary-card bouts.

In a heavyweight bout, Rolles Gracie (8-1) will square off against Dave Huckaba (21-4). And at lightweight, unbeaten Justin Gaethje (8-0) meets Brian Cobb (20-7).

Fans may best remember Gracie for his loss to Joey Beltran at UFC 109. But since his only career defeat, he's rattled off five consecutive victories, all by submission. Huckaba, a 39-year-old from Sacramento, has won nine of his past 10 fights.

Cobb is considered one of the better lightweights outside the UFC. The Baskersfield, Calif. fighter backed up his rep with a well-contested, split-decision win over Ronys Torres at the first WSOF event, which was his fifth win in his past six fights. Gaethje, a 24-year-old fighter from Arizona, has stoppages in seven of his eight fights.

Two preliminary bouts were announced as well. Battle-hardened veteran John Gunderson (34-14) will meet Dan Lauzon (16-4), the younger brother of UFC lightweight star Joe Lauzon, at lightweight. And in a battle of unbeaten middleweights, Bulgarian Krasimir Mladenov (8-0) squares off with Atlanta's Kenrdick Miree (5-0).