The 2017–18 season was Sunderland's 139th season in existence, and their first season in the Championship since 2006, after relegation from the Premier League in the previous season.[3][4][5] Along with competing in the Championship, the club also participated in the FA Cup and EFL Cup. The season covered the period from 1 July 2017 to 30 June 2018.
Simon Grayson began the season as Sunderland manager, following the departure of David Moyes in May 2017. However, he did not complete the full season, instead being sacked towards the end of October after only one win in his first fifteen league matches saw Sunderland rooted to the bottom of the table. He was replaced by former Wales manager Chris Coleman.
Sunderland suffered a second successive relegation on 21 April 2018, following a 1–2 home defeat to fellow struggling side Burton Albion, after they had led the match 1–0. Results elsewhere meant that the club competed in League One in the following season.[6][7][8]
The events of the season formed the backdrop to the first series of the documentary programme Sunderland 'Til I Die, which was released on Netflix on 14 December 2018.[9]
On 16 June 2017, Sunderland were drawn away to Bury in the first round.[52][53] A trip to Carlisle United was announced for the second round.[54] A third away trip in the competition against Everton was drawn for the third round.[55]