1. Robinson will experiment with single-and split-back formations , along with the traditional I. 2. Mariucci already has indicated one-back formations will be utilized more often this season. 3. With a two-tight end, two-back formation , Ferguson was in single coverage. 4. It causes the defense more trouble than any two-back formation . 5. From the I-back formation , Frazier generated 169.4 yards of offense per game last season. 6. They run the same people with a two-back formation , then go to three backs. 7. The Seahawks have used one-and two-back formations , and run from spread and traditional alignments. 8. The split-backs formation that has been the staple of Walsh's offense gives more options. 9. The two shared time in Buffalo's single-back formation last season. 10. Fedora runs his offense out of a no-huddle, one-back formation with three or four receivers.