Duncan McDonald was a Scottish footballer, who played as a right-sided full back Born in Bo'ness, McDonald started his career with Townside F.C.|Townside before joining Woolwich Arsenal in April 1909, but had to wait until 30 October 1909 to make his debut, against Manchester United. After that, he was a near ever-present in the 1909–10 season, with Archie Gray out of form and Joe Shaw moving to left back to cover, leaving a vacancy at right-back. However, in 1910–11 Gray forced his way back in and McDonald only played one league game all season. McDonald played 27 times for Arsenal in total, before leaving in the summer of 1911 for West Hartlepool.