The San Francisco 49ers, having already committed more than $7 million per year to Vernon Davis, weren't willing to pay starting money for No. 2 tight end Delanie Walker.2012 Targeting Walker (Regular Season)That is why the 49ers lost Walker to the Tennessee Titans in free agency, reportedly on a four-year deal worth $17.5 million.San Francisco ideally would have held onto Walker. Walker played 57 percent of the offensive snaps last season.