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Colin Kaepernick, perhaps in a fit of insanity, playing with arms exposed at Green Bay

GREEN BAY, Wis. – Colin Kaepernick wasn't cold on Sunday. Or at least that's what he wanted everyone to believe.

Kaepernick, the San Francisco quarterback, scoffs at tricks like "long sleeves" to stay warm even when it's so cold that health officials were advising people to stay inside. Kaepernick, who was born in Milwaukee, didn't wear long sleeves for Sunday's 23-20 wild card win over the Green Bay Packers, going with his arms exposed at Lambeau Field. 

"It's not cold," Kaepernick said after the game. "It's all mental." 

Whether that's a show of toughness or craziness is up for debate. The temperature at kickoff was five degrees with a wind chill of minus 10, and the wind chill was supposed to dip past 20 below zero later in the game.

About half of the Packers' team didn't wear long sleeves during pregame warm-ups, including receivers Randall Cobb, Jordy Nelson and Jarrett Boykin, running back Eddie Lacy, linebacker A.J. Hawk and the entire offensive line. About 10-15 49ers didn't wear long sleeves, including linebacker Patrick Willis, receiver Anquan Boldin, left tackle Joe Staley, running back Frank Gore and Kaepernick.

Fox sideline reporter Erin Andrews wasn't among those trying to act tough. She brought a bunch of battery-operated heating equipment for her assignment covering the game outside.

I will be covered head to toe w/ battery packs tom..heated gloves, socks, insoles @Thewarmingstore #charging pic.twitter.com/HzudIgjpsx

— Erin Andrews (@ErinAndrews) January 5, 2014

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(Fox screen shot)

Andrews said on Fox the 49ers brought 2,500 pounds of extra clothing to battle the cold weather, and every player had three pairs of shoes.

Kaepernick didn't need any of it. What cold weather?

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Frank Schwab is the editor of Shutdown Corner on Yahoo Sports. Have a tip? Email him at shutdowncorner@yahoo.com or follow him on Twitter!

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