As a junior he joined Oxford City Athletic Club and had some success, resulting in an opportunity to represent England as an under 23.

He did not have to wait long for success, and in 2012 won both England's and Britain's strongest man in the under 105 kg category.

He continued to compete in the under 105 kg category and in 2013 retained both the England's Strongest Man U105kg and Britain's Strongman U105kg titles.

This was his last competition in the under 105 kg category before fully transferring to the main circuit.

Kelsey was born in Oxford and remains there working as a full-time firefighter and personal trainer.