- Lawrence Gerard Nassar (born August 16, 1963) is an American convicted serial sex offender and former family medicine osteopathic physician. He served as a team doctor for the United States women’s national gymnastics team from 1996 to 2014, where he used his position to exploit and sexually assault hundreds of young athletes as part of the largest sexual abuse scandal in sports history. Nassar was a team physician at Michigan State University under William Strampel from 1997 to 2016, and multiple student athletes reported his inappropriate behavior.