The extension for Davis puts him under contract through 2019. He got more guaranteed money than Jake Long, the overall top draft choice in 2008 who went from Miami to St. Louis for $16 million guaranteed this offseason.
Davis' agent, Drew Rosenhaus, has worked on several new deals with 49ers players in recent seasons and was optimistic last fall of getting something done for the offensive lineman. Rosenhaus worked on running back Frank Gore's three-year extension before the 2011 season that takes him through 2014. He then negotiated linebacker NaVorro Bowman's five-year contract extension in November worth $45.25 million, with $25.5 million in guaranteed money.