Davis James Marshall Keillor-Dunn (born 2 November 1997) is an English professional footballer who plays as a forward for EFL League One club Sheffield Wednesday on loan from EFL Championship club Wrexham.
Keillor-Dunn spent his youth career at Middlesbrough, Sunderland and Chesterfield before moving to Ross County on 22 July 2016. Whilst playing for the youth team in the 2016–17 season, he was one of the stand-out performers as they won their first Development League title. He was awarded a first team contract in summer 2017.
On 9 August 2017, he made his senior debut coming on as a substitute against Motherwell in the League Cup. On 9 September 2017, he made his first competitive start in the League against Partick Thistle, impressing in a 1–1 draw. On 14 October 2017, he scored his first goal for the club in the League against Hearts. He signed a new contract on 31 October 2017 after his initial break-through into the first team.
Keillor-Dunn moved on loan to Falkirk in January 2019. His first goal for Falkirk was against Queen of the South, where he was also sent off in the match. He left County by mutual consent in September 2019, after requesting more game time.
On 16 January 2020, Keillor-Dunn signed for Wrexham until the end of the 2019–20 season.
On 7 October 2020, Keillor-Dunn signed for EFL League Two side Oldham Athletic on a one-year deal. He scored his first goal for Oldham on 10 November 2020 in an EFL Trophy group game against Bradford City.
After scoring five goals in four consecutive matches as Oldham fought against relegation, Keillor-Dunn was awarded the EFL League Two Player of the Month award for February 2022. Following Oldham's relegation to the National League, Keillor-Dunn was released by the club at the end of the 2021–22 season.
On 28 June 2022, League One club Burton Albion announced the agreement of a two-year deal with Keillor-Dunn. He scored six times in 26 appearances for Burton, including a first career hat-trick in a 4–4 draw at Accrington Stanley on 13 August 2022.
Keillor-Dunn moved to League Two side Mansfield Town on 31 January 2023. In the 2023–24 season, he scored 22 goals as Mansfield earned promotion to League One. His performances earned him a place in the EFL League Two Team of the Season.
On 30 August 2024, Keillor-Dunn joined League One club Barnsley on a three-year deal for an undisclosed fee.
Keillor-Dunn scored 19 goals in his first season at Barnsley and earned the clubs' Player of the Year award for the 2024–2025 season.
On 2 February 2026, it was announced Keillor-Dunn has signed for Wrexham on a three-and-a-half year deal, returning after nearly 6 years away from North Wales.
On 3 September 2026, it was announced Keillor-Dunn had signed for League One club Sheffield Wednesday on loan until 2 January 2027. He made his debut the following weekend against Peterborough United, starting the game in a 2–1 win.
EFL League Two third-place promotion: 2023–24
EFL League Two Player of the Month: February 2022
EFL League Two Team of the Season: 2023–24
PFA Team of the Year: 2023–24 League Two
EFL League One Team of the Season: 2024–25