The UFC, and MMA in general, has evolved a great deal in a short amount of time.

If you need any proof of that, just take a short trip back to 2005.

Six years ago today, the UFC was one week removed from UFC 52: Couture vs. Liddell II. It was a milestone event for the organization as it was the first PPV event following the debut season of the Ultimate Fighter.

The card featured some of the best fighters in the UFC at the time, but when looking back, it represents just how much the sport has changed since then.

Here is a look at all the champions as of six years ago today, and how their stock has dropped since then.

Heavyweight Champion: Andrei Arlovski – Arlovski had won the interim heavyweight title from Tim Sylvia at UFC 51 and was eventually stripped of the interim label when then-champion Frank Mir couldn’t compete after a motorcycle accident. Arlovski had a dominant run, winning three-straight title fights in the first round. But, “The Pitbull” then suffered back-to-back losses to Sylvia and was never quite the same. At one time he was the most feared fighter in the UFC, but he now is currently on a four-fight losing streak, with three coming by first round knock out. Arlovski’s hands have gotten slower, his chin has gotten weaker, and he never evolved his grappling. That combo caused him to become nearly irrelevant in the MMA. In today’s world, Arlovski would get decimated by current champ, Cain Velasquez.

Light Heavyweight Champion: Chuck Liddell – Liddell was on top of the world at this time six years ago. He just knocked out Randy Couture in 2:06 to win his first UFC Championship. Liddell followed that up with four successful title defenses, all by KO. He was considered an unbeatable champion for two years, but then ran into the powerful hand of Quinton “Rampage” Jackson, who took the title from Liddell in May of 2007. That loss started the complete downfall of Liddell’s career. He would go on to lose five of his next six, four by KO, which forced his retirement. Liddell’s hands were great, but his style never evolved, and became too predictable. With that, his chin got weaker and he was an easy target for other light heavyweights. It is hard to imagine a scenario where Liddell would be able to contend with today’s champ, Jon Jones.

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