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Federico Anthony Warner was born on November 19, 1996, in San Marcos.

After experimenting with different sports, Warner began playing football when he was seven1

 After experimenting with different sports, Fred Warner began playing football when he was seven

June 2018, the 49ers signed Warner to a four-year, $3.97 million contract

Warner announced he would change his number from 48 to 54  in 2019