Enjoying several sports helps protect you from injury and improves your overall fitness.
Exercise is wonderful.
It can ward off illness, fill you with energy, improve your sex life, and encourage a good night's sleep. But you can get too much of a good thing. Working out too long and too hard at one activity will lead almost inevitably to injury. If you've been concentrating on just one sport, consider substituting one or two others in your weekly workout schedule. Cross training not only improves overall fitness while reducing the risk of injury, it also can actually help heal damage already done.