Donald McKay was a Scottish footballer who played as a full-back for Southampton St. Mary's in 1896–97, when they won the Southern League title for the first of six occasions over the next eight years.
He had been a regular member of the Woolston Works football team for several years before being signed by Southampton St. Mary's in the summer of 1896.
He played at right-back with his fellow Scotsmen James McKie at left-back and William McMillan at right-half.
McKay retained his place for a further seven league games, before being replaced by Samuel Meston, who had moved over from the left with McKie returning on the right,[2] and spent the remainder of the season in the reserves.
[1] The Saints won the first nine games of the season and finished unbeaten after twenty matches, thus claiming the Southern League title for the first time.