Sports injuries expert witnesses may consult on exercise physiology, sports injuries, sports medicine, and orthopedic rehabilitation, as well as related topics. www.standard.net/ reports that 46 year old soccer referee Ricardo Portillo has died after being punched in the head by a 17 year old goalie. The player was called for a foul and issued a yellow card warning. Portillo’s daughters had begged him to stop refereeing because of the growing risk of violence from angry players.