DENTON, Wash. (AP) — Seattle Seahawks star Richard Sherman is a huge Harry Potter fan.

So with Halloween looming, Sherman agreed to a request from his son. He donned a cape and grabbed a wand for his weekly media session, presenting a very authentic Harry Potter look.

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His display came three days after the Seahawks and Arizona Cardinals played to a 6-6 tie in the desert that left Sherman dehydrated. Sherman acknowledged on Wednesday that “five quarters of football is pretty tough, but Quidditch — the Beaters, the Chasers, trying to find the Golden Snitch — is tough.”

Summoning such terms from the Harry Potter books earned the Seahawks at least one new fan. Harry Potter author J.K. Rowling wrote in a post Thursday: “Did I ever mention that I’m a #Seahawks fan? Well, I am.”

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Well, not quite.

She added: “(Don’t ask me who plays for them apart from R Sherman.)”

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