Born in Rochdale, Greater Manchester, Allen joined Rochdale's youth system in 2003, aged eight.[4] After being instrumental in the Academy (being also shortlisted for League Two Apprentice of The Year),[5] he signed a professional deal in 2013 summer.[6]
Allen made his professional debut on 8 October, starting in a 1–0 win against Port Vale.[7] He has been compared to Manchester United and England midfielder Paul Scholes.[8] He made his league debut four days later, starting in a 3–0 home win over Newport County, hitting the bar in the lead-up to the second goal.[9]
Allen scored his first professional goal on 2 November, but in a 2–1 home loss against AFC Wimbledon.[10] On 27 June 2014, he signed a new two-year contract with Rochdale.[11] On 7 August 2015, Allen was named captain of Rochdale.[12]
Allen signed a three-year contract with League One club Coventry City on 28 June 2019 for an undisclosed fee.[15]
After injuries hampered the start of his time with The Sky Blues, Allen finally made his first League appearance for the club off the bench in a 1–1 draw with Sunderland.
Allen would go on to make a further 10 appearances before the season was curtailed due to the COVID-19 Pandemic. Coventry were crowned Champions of League One and Allen picked up a winners medal.
In 2020–21, Allen was used mainly as a squad player as Coventry competed in The Championship for the first time in 8 years. His only goal of the season come in a 2–0 win against Sheffield Wednesday.
Allen became a key player in the Sky Blues squad in the 2021–22 and impressed with his energetic box to box midfield performances. His fine form throughout the campaign earned him a new contract until July 2024[16] His only goal of the 2021–22 season came in a 2–1 win against Reading at The Coventry Building Society Arena.[17]
On February 6, 2024, Allen suffered a fractured cheekbone as a result of a challenge from Di'Shon Bernard of Sheffield Wednesday during a FA Cup 4th-round replay which Coventry won 4–1.[18]
Career statistics
As of match played on 26 December 2024
Appearances and goals by club, season and competition