From York, Pullen made his debut at Q School in 2021 as a fifteen year-old and his performances included a win over former professional James Cahill.

[3] Pullen reached the final the WSF Junior Snooker Championship held in Sydney, Australia in February 2023, with a highest break of 143.

[5][6] In March 2023, he reached the final of 2023 EBSA European Snooker Championships in Malta where he was defeated by Hungarian Bulcsú Révész.

[12] Pullen made his professional debut in the draw for the 2023 Championship League held at the Morningside Arena in Leicester, England from 26 June 2023.

[13] Pullen recorded the biggest win of his career when he defeated former world champion Graeme Dott in qualifying for the 2023 International Championship in September 2023.