[4] In 2020, Houston was handed a two match suspension for breaching the AFL's COVID-19 protocols, after he and teammate Peter Ladhams had invited unauthorised visitors into their home.

[8] He also finished third in the John Cahill Medal count that year, behind fellow All-Australians Connor Rozee and Zak Butters.

[9] During the third quarter of the 56th Showdown against cross-town rivals Adelaide, Houston engaged in rough conduct with Izak Rankine.

Houston was sent immediately to the AFL's tribunal,[10] and banned for five matches after an unsuccessful appeal, meaning he missed the rest of the season.

[11] In October 2024, despite previously stating in August he would remain at Port Adelaide, Houston requested a trade to a Victorian club.