Offensive roles you or your team is in possession of the object depending on the sport. Defensive roles you or your team are looking to get the object back in your possession. The way these two compare is either way you want the object and it is a team effort to achieve both roles successfully.
Density = mass/volume. 5000/50= 100 grams per cubic centimeter. No substance on Earth has anywhere near that density. Tops is about 20 for osmium and gold.