In early 2012, Griffin signed a full-time training contract with USA Rugby, and along with 7 other women, became the first professional female rugby players in the United States. Griffin moved to Chula Vista, California to train at the Olympic Training Center with the rest of the contracted 7s players. From 2011/2012 on, Griffin has played in the World Rugby Women's Sevens Series, captaining the USA team for several tournaments. Additionally, going into the 2016 Olympic Games, Griffin leads the country in appearances on the World Sevens Series Circuit, and is the only athlete of the "original eight" to have remained in residency throughout the four-year lead up to the 2016 Olympics.