By Andrew Holleran Longtime Pittsburgh Steelers quarterback Ben Roethlisberger officially called it a career earlier this week, announcing his retirement. Big Ben spent his entire career in Pittsburgh, winning two Super Bowls with the iconic NFL franchise. He will end up in Canton, Ohio in a couple of years. According to a new report, however, Big Ben nearly played for another National Football League franchise. Former 49ers head coach Mike Singletary reportedly rejected a Big Ben to San Francisco trade earlier this century. From The Athletic: Quarterback Alex Smith was in his fifth season in …