Ritchie's first win on the
Sunshine Tour was at Royal Harare Golf Club in the 2017
Zimbabwe Open where he beat
Trevor Fisher Jnr at the second hole of a playoff. He was third in the 2018
BMW SA Open and also finished third in the
2017–18 Sunshine Tour Order of Merit. In August 2018 he won the
Sun Carnival City Challenge. In March 2019, partnered with
Jaco Prinsloo, he won the Sunshine Tour
Team Championship and the following week won the
Limpopo Championship at the first hole of a playoff with
Steve Surry. The following month he won the
Zanaco Masters in Zambia, again at the first hole of a playoff against
Rhys Enoch. He had two further wins in early 2020, retaining the Team Championship and the Limpopo Championship in successive weeks. In May 2021, Ritchie won the
Bain's Whisky Cape Town Open, beating
Jacques Blaauw in a sudden-death playoff. He successfully defended this title in February 2022, winning by one shot ahead of
Christopher Mivis. The following week, he won the
Jonsson Workwear Open, winning by six shots, again ahead of Mivis. Ritchie won three times on the
Challenge Tour in 2025, earning him an automatic promotion to the European Tour for the remainder of 2025 and all of 2026. He went on to finish season as the
rankings winner. ==Professional wins (16)==