By Daniel Chavkin The veteran running back is signing one more contract. View the original article to see embedded media. Frank Gore’s career looks to be over. The veteran running back told The SF Niners podcast he plans on retiring as a 49er before the season begins. “We still trying to figure out when I’m gonna do my one-day contract, do my retirement,” Gore said. “I told Jed York, I always want to be a Niner.” Gore spent 10 years in San Francisco, and he is the 49ers’ all-time leading rusher. He is the only running back in San Francisco history to surpass 11,000 yards in his career with the…