Thomas Mattias Poppler Isherwood (born 28 January 1998) is a Swedish professional footballer who plays as a centre-back for Elfsborg.
Isherwood has played in Sweden, Germany and England for Brommapojkarna, Bayern Munich, Bradford City and ÃÂstersund. He is also a former Sweden youth international.
Isherwood's father is English and his mother is Swedish.
Isherwood began his youth career with Fruängens IFm and his senior career with Brommapojkarna, making one appearance in the Swedish Cup in 2014. He moved to Germany to play for Bayern Munich in July 2015, and made senior appearances in the Regionalliga with Bayern's second team.
In 2015 he was linked with English club Manchester City. In April 2018 he was linked with a transfer to Scottish club Celtic, and he also trialled with Scottish club Rangers at the end of the 2017âÂÂ18 season.
In June 2018 he signed a two-year contract with English Bradford City. He said the club's youth player development appealed to him. In January 2019 he was linked with a transfer away from the club, back to Sweden. He later left the club by mutual consent. Later that month he signed for Swedish club ÃÂstersund.
In January 2021, he signed for 2. Bundesliga side Darmstadt 98 for an undisclosed fee on a contract until 2024. On 12 May 2024, the club announced that Isherwood would be one of several players who would leave the club at the end of the 2023âÂÂ24 season.
On 26 August 2024, Isherwood signed a contract with AIK until 30 June 2025. On 6 November 2025, AIK announced that Isherwood would leave the club when his contract ends on 31 December 2025.
On 6 January 2026, Isherwood signed a three year contract with Elfsborg.
Isherwood represented Sweden at youth international levels from under-17 to under-21. He is also eligible to represent England.