[2][3] Relegation from the EFL Championship was confirmed on the penultimate weekend of the season, 27 April 2019, when Rotherham lost away at West Bromwich Albion after Millwall had drawn their game earlier in the day.

The first announcement from the club regarding pre-season friendlies came on 31 May 2018, when a game against Mansfield Town was confirmed.

[6] Later on 1 June, the club announced two split-squad friendlies on the same day against Stocksbridge Park Steels and Sheffield F.C.

[7] On 5 June the club announced a friendly against Premier League opposition, with Neil Warnock's newly promoted Cardiff City being hosted at New York Stadium.

[10] On 4 July the opposition for two friendlies during the clubs Austrian training camp was announced.