Walaza runs for Athletics Gauteng North. He ran 10.36 seconds to win the U19 boys 100m race at the Curro Hazeldean Top 14 Athletics Meet which took place at the
Pilditch Stadium, Pretoria on 28 January 2024. He was runner-up at the South African Championships over 100 metres in April 2024 in a time of 10.27 seconds. He ran as part of the South African relay team which qualified for the 2024 Paris Olympics at the 2024
World Relays Championships in
Nassau, Bahamas. In June 2024, he was selected for the South African team for the
2024 Paris Olympics. Walaza won the 100 metres at the South African U20 Championships in Cape Town at the end of March 2025, finishing ahead of
Karabo Letebele. He ran 10.00 seconds for a second place finish behind
Gift Leotlela at the 2025 senior South African Athletics Championships over 100 metres the following month. He competed at the
2025 World Athletics Relays in China in the
Men's 4 × 100 metres relay in May 2025 and helped South Africa win the event. Later that month, he lowered his 100 metres personal best to 9.94 seconds whilst racing in Zagreb into a headwind of -0.3m/s. He finished sixth in 10.04 seconds at the
2025 Prefontaine Classic on 5 July. That month, he won the sprint double over 100 metres and 200 metres at the
2025 Summer World University Games in Germany, as well as a silver medal in the men's 4 x 100 metres relay. He suffered an injury running the 100 metres at the Diamond Lesgue Final in Zurich in August 2025. Despite this, he was selected for the South African team for the
2025 World Athletics Championships in
Tokyo, Japan, although he late had to withdraw from the team due to the injury. ==Achievements==