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One of the most obvious reasons to bring Walker into the UFC is for the headlines and media attention it would provide.
Walker is a football legend who would bring quite a few eyeballs to the Octagon and generate interest in the UFC.
Bernard Hopkins recently became the oldest boxer to win a major title, and while the two are nowhere near comparable, it's still relative to note how interested people were in seeing if the 48-year-old Hopkins could do it.
Much the same way fans tuned in to watch an aging Randy Couture or continue to cheer on a 42-year-old Dan Henderson compete, they would also likely follow Walker's story.
Aside from all the obvious storylines that are marketable for the UFC by bringing Walker in, there's also another story Walker could tell.
In his 2008 autobiography, Breaking Free, Walker claimed that he couldn't even remember the season in which he won the Heisman Trophy due to his diagnosis of dissociative identity disorder, more commonly known as "multiple personality disorder."
A lot of focus has been on mental health and the lack of treatment in America by major media outlets. Walker's story of how he copes with the condition and how he's overcame it only adds to the feel-good nature of his story.