SAN FRANCISCO, April 5 (UPI) --
The San Francisco 49ers have signed a five-year extension worth nearly $37.3 million with right tackle Anthony Davis
, a source told NBC Sports.
NBC quoted the source as saying the deal has $17 million in guarantees.
Davis, the NFL's 11th overall draft pick in 2010, has started in all 48 regular-season games in his pro career.
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