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Ronda Rousey is the UFC equivalent to a sports dynasty.

Like the Boston Celtics that won 11 championships in 13 years from 1957 through 1969, Rousey has an aura of invincibility, and with good reason given her 12-0-0 record and the fact most of her fights end in under a minute by TKO.

In most cases where one team or individual dominates a sport in a fashion rarely seen before them, the question of "is this success good for the sport" often comes up.

In this instance, Rousey's dominance absolutely is good for mixed martial arts.

For starters, the UFC needs superstars, whether it be men or women fighters that casual fans will want to spend money on pay-per-views to watch fight, while also following them outside the octagon.

Rousey's popularity has given her the opportunity to promote UFC and the sport in several different venues, including late night television, national sports networks such as ESPN, commercials and even the new "Entourage" movie.

This kind of publicity helps the sport receive valuable recognition.

Just look at golf. Tiger Woods won 14 major championships from 1997 through 2008, and the number of people who thought his run of success hurt the sport was minuscule at best. Golf became must-watch TV during a lot of Woods' tournaments and the ratings reflected that.

Until this year when Jordan Spieth emerged as a potential heir to Tiger's dominance, the ratings and overall interest in golf had waned because Woods hasn't been successful or healthy on a consistent basis since winning the 2008 U.S. Open.

The thing about Woods' sensational stretch of success was he did have worthy challenges. Guys like Phil Mickelson, Ernie Els and others challenged him, sometimes beating him at major tournaments.

Rousey, at least not right now, lacks those types of opponents. She's heavily favored, and deservedly so, in every fight, and none of them really have been close. Nine of her 12 fights lasted less than one minute.

Rousey's success is great for the UFC, make no mistake about it. But at some point the competition will need to push her for the sport to reach its highest level.

Watching "Rowdy" kick the crap out of her challengers is fun, and it will be for a while longer, but it's going to become a little boring if no real competitors step up and make these fights more interesting.

A challenger needs to emerge or Rousey might decide to take her talent and popularity to a more lucrative industry, such as entertainment.

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