Veteran fighters and former lightweights Dennis Siver (21-9 MMA, 10-6 UFC) and Manny Gamburyan (13-7 MMA, 4-5 UFC) are set to collide at UFC 168.

UFC official today announced the matchup for the Dec. 28 event, which takes place at MGM Grand Garden Arena in Las Vegas. It’s not yet known whether the bout will serve on the pay-per-view main card or prelims, which air on FOX Sports 1 and stream on Facebook.

Siver and Gamburyan both have reinvented themselves in the featherweight division, though their recent careers have diverged on paper.

In a widely panned call, Gamburyan outpointed Cole Miller at this past month’s UFC Fight Night 26 in Boston. Miller is appealing the official decision based on his belief that the referee did not incorrectly call a TKO in favor of him when he landed a series of elbows that rendered Gamburyan unable to continue.

There was no doubt about the outcome of Siver’s most recent appearance, which came in July at UFC 162 and ended when the surging Cub Swanson stopped him by third-round TKO. The setback was his first since dropping to 145 pounds, though he was awarded a “Fight of the Night” bonus for the bout.

Gamburyan has more experience under his belt as a featherweight, and as of late, enjoys a two-fight win streak following a three-fight skid, kicked off by a second-round TKO to now-UFC champ Jose Aldo under the defunct WEC banner, that threatened his employment with UFC parent Zuffa.

With the addition to the card, the UFC 168 lineup now includes:

Champ Chris Weidman vs. Anderson Silva – for UFC middleweight title Champ Ronda Rousey vs. Miesha Tate – for women’s bantamweight title Josh Barnett vs. Travis Browne Diego Brandao vs. Dustin Poirier Uriah Hall vs. Chris Leben Michael Johnson vs. Gleison Tibau Manny Gamburyan vs. Dennis Siver

For the latest on UFC 168, stay tuned to the UFC Rumors section of the site.

(Pictured: Dennis Siver)