Mackenzie Arnold is a 33-year-old professional football player from AUS. He currently plays for Portland Thorns FC Women, wearing the number 18 shirt. At the international level, he represents Australia Women. He plays primarily as a Goalkeeper. He stands at 181cm tall and weighs 76kg.

His most recent move was a Free from Brisbane Roar Women to West Ham United Women on 2020-07-01.

In the United States Women's National Soccer League 2025, Mackenzie Arnold played 23 matches, averaging 0 interceptions, 0 tackles, and 0.9 clearances per game.