Trying to make a name for oneself in performance apparel that professional athletes use -- and that aspiring athletes covet -- is never easy. Sure, Nike (NYSE:NKE) did it. However, there are also companies such as Callaway (NYSE:ELY), which has tried to transform its success with oversized clubs on the golf course into becoming another Nike but has ultimately fallen short.

At least Callaway still has a shot. Anyone else remember when Starter began airing its branded-apparel ads featuring star athletes such as Emmitt Smith and Karl Malone in the 1990s? No? Well, the company ultimately filed for bankruptcy in 1999.

That brings us to Under Armour (NASDAQ:UARM), a company that has been revolutionizing athletic apparel and is now making a splash in footwear.

The company has been growing quickly. It has also beaten the market since being recommended to Motley Fool Rule Breakers subscribers over the summer. Is it the right fit for you?

Not all Fools agree. This week, Tim Beyers and Anders Bylund can't see eye to eye -- or click to clack -- when it comes to the investing merits of Under Armour at this point. Tim is our bull. Anders is our bear.

If Dueling Fools is the ultimate sport, where is our branded apparel?

Duel on!

Longtime Fool contributor Rick Munarriz does not own shares in any of the companies mentioned here. The Fool has a disclosure policy .