I seem to remember reading something about tendons and ligaments not being able to cope with larger than normal muscle mass. But I'm no expert on the subject.
I think it works both ways.
Having bigger muscles allows you to exert more force on your joints whilst your ligaments don't get any stronger (i.e. pushing against resistence or changing direction more violently).
On the other hand, the muscles help stabilise the joint and act to lessen the impact on ligaments (i.e. if your quads/hamstrings weren't helping stabilise your knee and take a lot of the force, your knee ligaments would be under far more stress and be more susceptible to injury).
I think the one clear detriment to the extra muscle is that it adds weight and the more weight you're carrying, the more pressure you're exerting on your ligaments.
Some of the 'newer' injuries which have emerged in football like torn biceps and pectorals seem to be very much a result of people getting stronger and more muscly. These injuries were almost unheard of up until a couple of years ago.
I'm definitely no expert on this subject. My expertise begins and ends with my own knee injuries and keen interest in the medical side of that.