On January 22, 2020, Fitzgerald bought a minority stake in the NBA's Phoenix Suns to become a partial team owner. Fitzgerald is now the second active NFL player behind Aaron Rodgers to hold an ownership stake with a franchise in the NBA. He has developed a long-standing friendship with franchise owner Robert Sarver since 2005, with him getting more active and involved with the Suns since 2018. His role with the franchise involves him being an advisor and resource for the Suns' business and basketball staff, as well as be a player advisor for both the Suns and Phoenix Mercury, their WNBA franchise.