Romulus Allen began his career at the academy of
Midland Football League side
Romulus scoring 3 goals in 17 appearances for Romulus Reserves during 2016–17. After spending
2017–18 on loan, He left Romulus in October 2018.
Loan to Stafford Town Allen left to join
Stafford Town on loan in August 2017 where he made 30 appearances and scored 5 goals. He debuted for Stafford Town on 12 August 2017 as a substitute during the 4–2 loss against
Hinckley AFC. He scored his first goal for Stafford Town on 23 September 2017 during the 4–1 victory against
Ashby Ivanhoe in the
FA Vase second qualifying round. Allen also played in the
penalty shoot-out victory against
EFL League Two club
Port Vale in the
Staffordshire Senior Cup on 6 December 2017.
Wolverhampton Sporting Community Allen joined
Wolverhampton Sporting Community in October 2018. He debuted on 27 October 2018 during the 1–1 draw against
Loughborough University. He scored his first goal for the club on 15 December 2018 and it was the equaliser during the 1–1 draw against
Worcester City.
Nuneaton Borough Allen joined
Nuneaton Borough in January 2019, winning man of the match on his
National League North debut, before having a trial with
Leicester City in March, where he played for the under-23 team in
Premier League 2.
Forest Green Rovers Allen turned down offers from
English Premier League clubs to sign for
Forest Green Rovers in summer 2019 on a one-year deal. He made his
EFL League Two debut as a substitute against
Oldham Athletic on 3 August 2019, scoring the only goal of the game in the 72nd minute. Taylor joined
National League North side
Hereford on 25 October 2019 on a one month loan, with the loan being extended on 27 November 2019 for a further month. Taylor then joined
Gloucester City on loan for an initial month. On 2 December 2020, Allen joined
Leamington on an initial one-month loan deal. The loan was then extended for a further month. On 9 February 2021, the loan was further extended for an additional month.
Walsall On 20 June 2022, Allen agreed to join League Two club
Walsall on a one-year contract from 1 July when his Forest Green contract were to expire. He signed a contract extension at the end of the 2023 season. Allen scored his first Walsall goal in a 3–1 win over
Wrexham on 29 December 2023 and captained the club for the first time in a 3–0 win over
Morecambe. He signed a further extension to 2026 at the end of the 2024 season. He made his Wycombe Wanderers debut during the 2–1
EFL League One loss against
Bradford City on 2 August 2025. He suffered with a knee injury through November and December 2025, and returned as a second-half substitute on 26 December 2025 during the 4–0 loss against
Luton Town. ==Career statistics==