Mackie was a young, strong right back, and made his debut on 9 December 1922 against Birmingham City. He soon became a regular in the Arsenal side, making 23 league appearances that season and 31 the next.
Mackie was a young, athletic right back, making his debut on 9 December 1922 against Birmingham City. He quickly became a mainstay in the Arsenal team, appearing in 23 league matches that season and 31 the following year.