Grant Thorne

Strength & Conditioning Assistant


Grant Thorne enters his 11th year with the Packers in 2023 and ninth as a strength and conditioning assistant. His primary duties include designing, organizing and administering strength and conditioning programs, as well as advising on training methods using the latest in sports technology and key performance indicators he observes during practice and competition. He spent 2013-14 as a strength and conditioning consultant with the Packers.

Prior to coming to Green Bay, Thorne spent four years (2011-14) at Purdue University as a sports performance coach. While with the Boilermakers, he programmed several aspects of the strength, speed and agility training regimens for the football, track and field, and men's golf teams. He also served as an instructor for clinical students while working toward his master's degree in health and kinesiology sport performance, focusing on sports-science technology and methodology.

While earning a B.S. in science from Nicholls State University (2006-08), Thorne got his first coaching experience with the San Diego Chargers as a strength and conditioning summer intern in 2006. 

Thorne's multidisciplinary professional knowledge has its roots in his background as a two-sport professional athlete. After a two-year football career at Nicholls State (2006-07), Thorne played WR in the Arena Football League for the Los Angeles Avengers in 2008 before joining the Rugby Union's Sedgley Park Tigers as a winger later that year. In 2009, he participated in the USA Eagles National Rugby Team selection camp at the Olympic training center in Chula Vista, Calif.

While playing for Sedgley Park in the United Kingdom, Thorne served as an assistant performance coach for Everton Football Club of the English Premier League. In 2009, he returned to the United States to serve as a performance coach at Velocity Sports Performance in Manhattan Beach, Calif.

Thorne returned to the NFL in 2010 as a performance and monitoring assistant for the New York Jets. He set up and monitored performance-tracking devices and created reports that advised coaches and strength staff on how to best optimize training methods for their athletes.

In 2011, Thorne gained his initial collegiate coaching experience at Stanford University, where he served as an assistant performance coach for the Cardinal football and rugby teams. During his time at the school, Thorne assisted with the daily operations of the offseason football training program, and a speed-training regimen for NFL hopefuls that helped several future NFL products, including former Indianapolis Colts QB Andrew Luck and former Seattle Seahawks WR Doug Baldwin. 

Thorne's passion for athletic science led to him co-founding TRIUN Human Performance in 2006 with his brother, Kyle, a strength and conditioning coach training US military personnel in Japan. The California-based organization helps educate, train and mentor individuals and organizations in the disciplines and benefits of human performance and healthy nutrition in order to develop good lifelong habits and build strong character. Grant and Kyle designed and hold the patent to the Accu-Roller, distributed by SKLZ. Thorne is also certified as a sport-performance and corrective-exercise specialist by the National Academy of Sport Medicine. He is currently in the doctorate of technology program at Purdue University researching artificial intelligence and machine learning in sport.

Thorne was born in Tucson, Ariz. He and his wife, Courtney, reside in Green Bay with their daughter, Isla, and son, Bodhi. Courtney is a strength and conditioning coach with the Northern Iowa Area Community College softball team.