Video: Watch UFC 170's Daniel Cormier make his octagon debut against Frank Mir

In three days Daniel Cormier makes his long-awaited light-heavyweight debut in UFC 170's co-headliner. Ten months ago, he made his highly anticipated UFC debut as a heavyweight.

Check out that April 2013 bout, where Cormier took on former champion Frank Mir in UFC on FOX 7's co-headliner.

The fight was a stiff test for the Olympian and undefeated fighter, who emerged as the unlikely winner of the Strikeforce world heavyweight grand prix. However, Cormier proved his impressive Strikeforce run – which included victories over vets such as Antonio Silva and Josh Barnett – was no fluke.

Check out the subsequent fight with Mir in the video above.

And catch Cormier (13-0 MMA, 2-0 UFC) in action on Saturday at Las Vegas’ Mandalay Bay Events Center. “DC” takes on Patrick Cummins (4-0 MMA, 0-0 UFC), a late replacement for injured Rashad Evans, in the pay-per-view co-headliner.

For the latest on UFC 170, stay tuned to the UFC Rumors section of the site.