TMZ Sports Full Episode: Friday 01/17/14

Kellen Winslow Jr.'s arrest for marijuana got a lot stranger once we got the details from police. A witness says he was sitting naked with an erection -- and cops say he had 2 open jars of vaseline. Hmm ... Plus, Kobe Bryant goes back to school! He suprised a Boston College professor -- and his class -- last night. But the question is what the Mamba's trying to do with his higher education? And fitness model Jen Selter has one of the most famous butts on the Internet -- but wait till you see the TV report someone ran on her. It's definitely sexy ... and possibly racist.

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