Bull riding trading cards -- seriously?
There are those purportedly in the know who'll swear up and down that professional bull riding is swiftly stampeding its way deeper into the mainstream sports conscience.
Some folks, understandably skeptical of such a claim, will seek validation in the PBR's television ratings on Versus or in its burgeoning live attendance figures (a recent event at Jerry Jones' Cowboys Stadium attracted more than 40,000 fans).
But all the proof you really need to support the notion of an upwardly ...
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