If you know a few diabetics in your area, perhaps you could get close and strike up conversation. Let them tell you all about their suffering, and how they deal with it. You could catch a thing or two about the vegetarian diet some of them are forced to take now. And then you can decide if it is for you or if it is not. If they also take the time to tell you about the health implications of going this route, it just might help you to make up your mind.
As an athlete in training, I don't suppose you really need a vegetarian diet per se; you need all the energy you can garner about you as long as you are in serious training. In any case, the workouts should help you burn up all the unwanted calories in your system pretty good. A vegetarian diet might just deprive you of much needed energy.
Animal foods are good for you, but only up to a point. Beyond that point, they are just plain harmful and you don't need them in your diet anymore. If you have never been on a vegetarian diet, it is safe to assume that you are well beyond that point in which you were safe. Now will be a very good time to start up a vegetarian diet to cease your health back.
Think of a vegetarian diet in the sense of both fruits and vegetables. That means all that you need to look out for are products and foods from animals. Anything else is good enough to indulge. Just see to it that you get them properly balanced. The beauty is that your health will be the better for it, as is the case with most vegetarians.
Just about every age group under the sun needs a vegetarian diet. Since your daily foods are mostly comprised of calorie and cholesterol laden stuffs, you could afford to lay them off just a bit so that your good old body gets chance to recuperate. You are human, you know; not a machine.