SANTA CLARA, Calif. – The San Francisco 49ers will face one of their former offensive weapons Sunday in Tennessee.All-purpose tight end Delanie Walker left the 49ers for the Tennessee Titans in the offseason as a free agency. He has given the Titans' offense a similar spark as he did the 49ers. San Francisco coach Jim Harbaugh has noticed is not excited about playing against him."I'm not happy to see him in a Titans 82 jersey," Harbaugh said.