Paul Philip Mullin (born 6 November 1994) is an English professional footballer who plays as a forward for EFL League One club Wrexham.

[7][8] He made his professional debut coming on as a second-half substitute in the League Cup first round defeat to Bradford City on 12 August 2014.

[10] One week later, on 23 August, Mullin made his full debut scoring both goals in a 2–1 win away at Cambridge United.

[12] Mullin then went through a barren spell of 11 games without scoring, only finding the net again in a 2–1 loss at Accrington Stanley on 31 October 2014.

Mullin was well regarded by fans for his hard-working approach but goals were hard to come by; which led to his departure after one season.

[19] On 20 October 2020, he scored a hat-trick in a 3–1 victory over Port Vale, taking his goal total to 11 in ten matches in all competitions.

[25] Mullin was also awarded the League Two Golden boot after scoring 32 goals in Cambridge United's 2020–21 campaign, in which they secured promotion to the third tier of English football,[26] a record number for the division since its rebranding in 2004.

[27] At the end of the 2020–21 season, Mullin rejected a new contract offer with Cambridge United[28] and in July 2021 joined National League side Wrexham on a three-year deal.

[39] Later that season, he wore another message on his boots, carrying a dedication to his son Albi who had recently been diagnosed with autism.

[40] On 1 October, Mullin scored a last-minute penalty against Oldham Athletic to seal a 2–1 comeback win for his team, who went top of the league.

[46] On 4 March, Mullin scored both goals in a 2–2 draw with Maidenhead United, a result that saw Wrexham return to the top of the National League, one point clear of Notts County.

Mullin walked off the field with assistance while wearing an oxygen mask and was later hospitalized with broken ribs and a punctured lung, an injury which would cause him to miss the start of the season.

[59] On 2 March, Mullin converted his first hat-trick of the year and second of the season in a 4–0 win over Accrington Stanley with all goals being scored in the first half.

[60] He continued his impressive goalscoring form across the remainder of March, scoring seven goals and registering two assists in six matches, winning the League Two Player of the Month award for a second time in his career.

[63] Mullin had spinal surgery in June to help with a "long-term lower back/hamstring issue" which caused him to miss the start of the season.

[66][67][68] Mullin was placed on the standby list for the Wales national team for their October 2023 fixtures against Gibraltar and Croatia.