[1] The NHL Central Scouting Bureau rated Holloway as the 12th-best North American skater eligible for selection in 2020.

On April 16, 2021, Holloway opted to conclude his collegiate career, signing a three-year, entry-level contract with the Edmonton Oilers.

[6] Holloway spent the 2021–22 season in the American Hockey League with the Oilers' affiliate Bakersfield Condors, managing 8 goals and 14 assists in 33 games in the regular season, and then an additional 2 goals and 2 assists during 4 games in the 2022 Calder Cup playoffs before the Condors were eliminated.

[7] On June 6, 2022, Holloway made his NHL debut for the Oilers in Game 4 of the 2022 Western Conference Finals against the Colorado Avalanche.

[12] On November 5, 2024, Holloway was taken out of a game against the Tampa Bay Lightning on a stretcher and was sent to a local hospital after he was hit with a hockey puck in the neck.