[2] After his second overall selection in the 2020 NHL Entry Draft, Byfield was signed by the Los Angeles Kings to a three-year, entry-level contract on October 16, 2020.

[3] He was assigned to the Kings' American Hockey League (AHL) roster to begin the 2020–21 season where he played on a line with Akil Thomas and Devante Smith-Pelly.

During their first game together, Thomas recorded a natural hat-trick and his line combined for six points in the eventual win.

[9] On April 25, 2023, Byfield scored his first NHL Playoff goal in a 6-3 loss to the Edmonton Oilers.

[11] Byfield won a Gold Medal with Canada at the 2020 World Junior Championships held in the Czech Republic, posting one assist in seven games.