FALL ANNUAL: SPORTS ILLUSTRATED presents its ninth college football special. This will be a season of running backs, and Artist Frank Mullins paints a gallery of the best of them. Dan Jenkins reports on new trends and the 11 Best Elevens; then follow scouting reports on most of the others. Edwin Shrake tells of a photographer responsible for those wild pictures of high-striding halfbacks and madly diving linemen. John O'Hara provides a distinguished story of an aging All-America. Also in the issue: all of the news reports and regular features.