[4] In the lead up to the 1889 SAFA season a football reporter writing under the pseudonym 'Centre' for the Port Adelaide News forecasted that "A. McKenzie (as I have mentioned before) and P. Begg have indications of making really first class players.

[8] McKenzie made his debut in the first game of the 1889 SAFA season in a win against Medindie (North Adelaide) on Alberton Oval with 'Goalpost' writing for the Evening Journal commenting on Alexander's likeness to his brother John stating that "McKenzie has his brothers style, both marking and kicking well".

[2] During the 1890 season McKenzie's older brother John, who also played as a key position forward, was keeping Alexander out of the Port Adelaide side.

As a result, Alexander McKenzie moved to the Adelaide Football Club halfway though the 1890 SAFA season seeking greater opportunities to play as a key forward.

[11] In a game against Old Adelaide on Alberton Oval during the 1893 SAFA season Alexander McKenzie kicked 13 goals.

[19][20] McKenzie had four brothers – Rod, Duncan, Ken and Jack; the latter two played for Port Adelaide with Alexander.