The Grand Slam Rule Book specifies that advertising logos cannot exceed four square inches (26 square centimeters) if there is one logo, or 2 two square inches (13 square centimeters) if there are ...
Grand Slam Track, launched by American legend Johnson in June, will aim to bring together the world's elite runners, offering $100,000 (£78,683) as a top prize. Starting in April 2025 ...
Great Britain sprinter Zharnel Hughes will take part in the inaugural season of Michael Johnson's Grand Slam Track in 2025 ..