Well its also known as a herniation of the disc. the disk actually sticks out and bulges at the nerve root. So it causes intense pain when you move or turn a certain way. Depending on how tight the muscles are in that area can determine how bad the pain is. Unfortunately for tim he plays a position where he has to bend about 85% of the time, so this injury depending on which disc is injured may cause him intense pain all the time. He will either have to play thru and and never be 100% or have surgery and probably be a little closer to 100% but not much. The surgery includes removing the disc and replacing it with bone, so you tend to lose mobility.
Im not a doc, but i am an athletic trainer and have seen many fb and baseball plyers with this injury