Crawford "came clean" about rampant steroid use, but not the injury afaik.I could have sworn I read somewhere years later that Crawford admitted the injury came from a bar fight, and it has made me suspicious of every funny-sounding player injury ever since. However, I've been googling and can't find any documentation corroborating my memory. Maybe someone remembers, or maybe I imagined the whole thing.
https://www.boston.com/sports/extra-bases/2006/06/21/crawford_comes_1/