[4] He credits the UC Santa Barbara Gauchos men's soccer team as his inspiration for starting the game as he served as a ball boy and they held camps near his hometown.

In September 2012, Boyd signed a three-year contract for the Wellington Phoenix[7] and made his debut as a 17-year-old, coming on as a substitute in an A-League match against Sydney FC on October 6, 2012.

[9] On February 24, 2015, Boyd signed a four-year deal with top Portuguese side Vitória de Guimarães to begin at the conclusion of the 2014–15 A-League season.

[11] On January 31, 2019, Boyd joined Turkish Süper Lig side MKE Ankaragücü on loan until the end of the season.

[13] On November 7, 2019, Boyd scored his first goal for the club in a 3-1 defeat to Sporting Braga in the group stage of the UEFA Europa League.

[21] On May 18, 2019, having solely appeared in friendly matches for New Zealand, FIFA approved a one-time switch for Boyd to represent the United States internationally.