Ask the Fight Doc: What do you make of Nick Denis' unexpected MMA retirement?

Promising UFC bantamweight Nick Denis caught many surprise when he announced his MMA retirement on Thursday.

As the former Ph.D. student detailed in his blog, Denis was concerned about brain injury and decided to call it quits at just 29 years old.

MMAjunkie.com medical columnist and consultant Dr. Johnny Benjamin read Denis' blog and gives his thoughts on the fighter's decision.

Source: http://feedproxy.google.com/~r/mmajunkie/~3/2dweTgaRwyY/ask-the-fight-doc-what-do-you-make-of-nick-denis-unexpected-mma-retirement.mma

Sugar Ray Leonard Sugar Ray Robinson Rocky Marciano Vitali Klitschko