Tipped for success from a young age by Ian Poulter after impressing as a junior – carded a 59 at the age of 13 at the Highlands Reserve Golf Club in Orlando.
Excelled on the college circuit at the University of Florida, where he won three tournaments in his first season in 2015. Competed in the 2015 and 2016 U.S. Opens after coming through qualifying.
Turned professional in 2017 and progressed through all three stages of Qualifying School to earn a rookie season on the European Tour in 2018 – Horsfield won Final Stage by eight shots after an outstanding final round 63.