It sounds like Cato's fracture included both bones of the forearm (ulna and radius), which is a common combination from a direct blow to the forearm in football. When both of the bones are broken along their shaft, the various muscles groups attached to them will spasm/contract in response to the injury and pain. This creates constant differential torquing stresses and variable movement of the bone segments. This combo fracture almost always requires surgery in an adult, since without surgery, the forearm is generally unstable and there is no ability to cast this type of fracture in a proper orientation.
These type of forearm fractures are most commonly treated by placing a metal plate and screws on both the radius and ulna bones. Some surgeons will use a rod within the bone to maintain the position of the bone, but this can't be done in fractures where rotational stability is an issue. Therefore, most both bones forearm fractures are treated with a plate and screws. This approach also allows quicker football ready return since you are not relying only on bone strength through natural healing. If the aforementioned scenario is indeed the case, true "football ready" rather than just being able to begin testing the arm, hopefully will be 6-8 weeks.