B.A.A. 10K M15-19: Delmace Mayo Owns the Age Group

• Solo winner: Delmace Mayo was the only M15-19 finisher, crossing in 28:05 at a 4:31/mi average.
• Scorching pace: 4:31 per mile across 6.2 miles in 93°F heat is a genuine statement of fitness.
• Strong closing kick: Mayo posted the 4th-fastest split among the men on the 8K-to-finish stretch.

Delmace Mayo, 19, from Jamaica Plain, had the M15-19 age group entirely to himself on a brutally hot Boston morning — 93°F with a 15 mph wind that offered little mercy on the roads. Running without a competitor in sight within his age group, he still had every reason to push: the broader men's field was right there to race against.

And push he did. Mayo's 28:05 finish at 4:31 per mile is a sharp effort under any conditions, let alone a sweltering June day in the city. He held his position steady through the middle miles, sitting 5th among the men at both the 5K and 8K checkpoints, and never wavered from that spot. Consistency like that, especially in the heat, speaks to disciplined pacing rather than a reckless early surge.

The most eye-catching number came late: Mayo's 8K-to-finish split ranked 4th-fastest among all the men in the field. When others were wilting in the final stretch, he was accelerating — or at minimum, holding form better than nearly everyone around him. For the lone representative of M15-19, that closing speed was the exclamation point on a composed, confident run.