The 49ers seem to think that Jauan Jennings is bluffing. Jennings demanded an extension or a trade before training camp, and so far, the 49ers have given him neither. Jennings doesn’t seem ready to drop his demands and play ball on the 49ers’ terms. Most people assume that his calf would feel much better if the 49ers were to give him a giant raise, but we can’t know for sure.