Canadian distance runner Moh Ahmed competes in the Olympic men’s 10,000-metre final at Stade de France in Paris on August 2, 2024.

Moh Ahmed's long-awaited debut in the half marathon is back on hold. The Canadian distance runner was scratched from Sunday's 21.1-kilometre race in New York City due to back spasms and adductor issues suffered this week in his final workout.