Not really, but there's this
The Sports Medicine Review is a website dedicated to all things sports medicine for physicians, athletic trainers, physical therapists and more.
www.sportsmedreview.com
Click on Fellowships and it will show a database. people are free to edit/update each program.
Really the best way to know about the fellowships is attending the AMSSM meeting, which unfortunately is virtual this year due to COVID. During those 5 days you literally can interact with alumni, fellows, PD's about programs and get a good feel for each one.