Injuries in weight training and bodybuilding workouts is not uncommon and for the most part is soft tissue injury -- muscle, tendons, ligaments and joint injury. If you train hard, injury at some time is, well, inevitable, especially if you play power and body contact sports. I've injured both rotator cuffs (months off), grade 3 hamstring (and many minor tears), broken fibula and sprained ankle, many stitches (in head and legs), illiotibial band, groin, lower back (more or less chronic but manageable), costal cartilage (still detached but manageable), and no doubt I've forgotten quite a few minor ones. Knees, hips, elbows and ankles have mostly served me well.
The point is, you do have some control over injury, especially in the gym. Here's a rundown: