Comcast Sportsnet speculates that 49ers TE Delanie Walker might emerge as the third-best receiving option behind Vernon Davis and Michael Crabtree in Jim Harbaugh's offense in 2011. Walker's size and ability creates a mismatch opportunity that previous Niners' coaches have missed using. Walker ended last year with 29 catches for 331 yards, but failed to score a touchdown. Source: CBSSports