2023 He won three ITF junior events in New Zealand at the start of 2023. With
Darwin Blanch and
Maxwell Exsted, he was part of the American team which finished third at the
2023 Junior Davis Cup. During the 2023 season he achieved a streak of 17 consecutive victories.
2024 In January 2024, he won his first match at a grand slam junior event at the
2024 Australian Open. Although he lost to Jones, he reached the semifinals of the Boys doubles competition alongside
Kaylan Bigun. He also paired with Bigun at the
Boys' doubles at the
2024 French Open. Competing at the
2024 Wimbledon Championships, he reached the quarter finals of the boys singles and teamed up again with
Kaylan Bigun in the boys doubles where they reached the semi finals.
2025 He reached the semi-final of the boys' singles at the
2025 Australian Open following wins over Flynn Thomas and
William Rejchtman Vinciguerra. In the semi-final he lost in three sets to compatriot Benjamin Willwerth. Playing alongside Brit Oliver Bonding, he also reached the semi-final of the
boys' doubles at the Championships. Alongside Bonding he reached the final of the Boys' doubles at the
2025 Wimbledon Championships with a semi-final win over Dutch pair
Mees Rottgering and Hidde Schoenmakers.
2026 Whilst at
Stanford University, Leach played doubles alongside
Nicholas Godsick, whose mother
Mary Joe Fernandez formed a professional doubles partnership with his mother. ==Personal life==