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SAN DIEGO – As the San Diego Chargers kicked off their final week of organized team activities Monday, running back Ryan Mathews added a little socks appeal to the practice.

Mathews broke the mold of traditional team socks and shoes and instead wore Superman-themed socks and shoes from Under Armour.

On the Chargers website, Mathews said his nickname is “Superman.”

Fox5 tried to talk with him about his footwear after practice, but he avoided the media like kryptonite and ran faster than a speeding bullet into the locker room, also known as the “fortress of solitude.”