San Francisco 49ers inside linebacker Chris Borland (50) against the Oakland Raiders during a game at O.com Coliseum in Oakland, Calif. on Sunday, Dec. 7, 2014.

49ers’ Chris Borland retiring at 24, wary of head trauma

Borland played his college ball at the University of Wisconsin.

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Demand for Badgers merchandise increases

As Badger fans prep for the big game on Friday, Madison-area businesses are finding ways to satisfy the need of getting red and white mercha…