Paul Leon Miller McCallum (born 28 July 1993) is an English professional footballer who plays as a striker for National League side Eastleigh.

Over the course of the 2010–11 season, the striker scored a total of 15 goals in 7 games in the FA Youth Cup, including a hat-trick to produce a shock 3–2 victory over Football League One side Yeovil Town in the Second Round.

[6] The striker ultimately chose West Ham United, signing a professional contract with the Hammers on 31 January 2011, citing their reputation for bringing young players through as a key reason for his decision.

[9] McCallum's first involvement with the West Ham United senior squad was on 28 August 2012 as an unused substitute in the Second Round of the Football League Cup, in which the Hammers beat Crewe Alexandra 2–0.

[13] The striker made his debut for the Dons on 24 November 2012, in a 3–1 defeat by Morecambe, but was awarded a red card in the 82nd minute for a foul on Nick Fenton.

[14] AFC Wimbledon manager Neal Ardley sought to give the young striker a second chance to prove himself however, by extending his loan spell until 19 January 2013.

[15] Having served out his three match suspension, McCallum returned to AFC Wimbledon's starting eleven on 29 December 2012 in a 3–0 defeat by Oxford United.

[21] On 22 February it was announced that McCallum had returned to parent club West Ham United a day earlier than planned after failing to shake off an ankle injury.

[25] He scored his third and final goal in a 2–1 away defeat to Accrington Stanley on 23 November but soon after returned to West Ham prematurely after receiving a back injury.

[29][30] He made his debut for Hearts on 2 February in a semi-final of the Scottish League Cup against Inverness Caledonian Thistle coming on as a 64th-minute substitute for Dylan McGowan.

[44] On 10 February 2023, McCallum signed for Chesterfield on loan until the end of the 2022–23 season, helping the Spireites reach the National League Play-Off Final.