This tall powerful young fast bowler burst onto the scene during the ICC U19 World Cup in South Africa in 2020. He was very impressive with his pace and accuracy and was a handful for the young batsman in the tournament. He was named as a traveling reserve for the West Indies men’s Test tour of New Zealand at the end of that year and made his first-class debut for West Indies A Team against New Zealand A in Nelson. He played a crucial role with the new ball when Trinidad and Tobago Red Force win the CG Insurance Super50 Cup in Antigua in February 2021. He got his first Test cap at age 19 against South Africa in St. Lucia in June 2021. He became the youngest West Indian bowler in history to take five wickets in a Test match against Pakistan in Jamaica (5-55 in the second innings) to follow up his 3-70 in the first innings. He had a fantastic match as he also played a crucial role with the bat when he helped Kemar Roach in a superb last wicket partnership as West Indies won a nailbiting contest by one wicket. Seales was named the Player-of-the-Match.