Here are some links that explain femoroacetabular impingement. I put this together because this has been the source of my hip pain for the last few years and I want to share with anyone else who is similarly affected.
Eric Cressey on learning about the role of the pelvis / core:
In researching FAI, I found a couple of good websites:
my hip surgeon, Dr. Mark Dolan
Kevin Neeld on training for individuals with FAI,