Image Credit: Golden Boy Promotions / YouTube

Lots of people were skeptical about the ability of Chuck Liddell to compete at a high level, at the age of 48 and after a seven-plus year break from fighting, and those folks likely feel validated today.

Liddell returned from retirement last night to face his longtime rival, Tito Ortiz, and as you can see by watching the clip below, the latter knocked him out in round one.

The two fought before in 2004 and 2006, under the UFC banner, and Liddell stopped Ortiz in both bouts. Here are the main card results from the Los Angeles event (via MMA Junkie):