On 23rd March 2018, Norwich City announced their first Summer 2018 signing after coming to terms with Dagenham & Redbridge for City to sign their 21 year old striker. Bloomfield came through the Daggers' academy and made a League Two appearance whilst aged 17. He later had loan spells at Chatham Town, Erith & Belvedere, Maldon & Tiptree, Chelmsford City, Billericay Town, Grays, Witham Town, Brentwood and Aveley (twice)before returning to the Dagenham first team. he made 28 appearances for Dagenham scoring three goals.

On 25th June 2018, it was announced that Bloomfield would be joining Scottish side Hamilton on loan for the 2018/19 season following in the footsteps of Remi Matthews and Carlton Morris.

Mason returned to England on 4th January 2019 with his loan to Hamilton cut short, having made just seven appearances. He immediately joined Conference side AFC Fylde on loan until the end of thr 2018/19 season. However a broken wrist ended his season early,

On 31st May 2019, he joined League Two side Crawley on a season long loan. He scored four goals in 23 games for Crawley.

He was released by Norwich on 27th May 2020. On 5th August 2020, he signed for National League side Hartlepool.

On 3rd July 2021 he returned to London to sign for Harry Kewell's Barnet along with fellow ex-Canary Jordan Thomas..

On 8th February 2022 he moved to fellow National League side Bromley for an undisclosed fee.

He joined Farnborough on a short-term contract on 1st January 2023 but signed a contract to join Hampton & Richmond Borough from 1st July 2023 on expiry of his Farnborough contrac.