# Constitution River wins Eclipse Stakes, giving O'Brien 10th victory

Constitution River dominated the Eclipse Stakes, securing trainer Aidan O'Brien's 10th win in the prestigious race. The live blog covered the race's key moments and reactions. The victory marks a milestone in O'Brien's storied career in horse racing.

**Importance:** 3/5

## Sources

### Sports
- [The Guardian Sport](https://www.theguardian.com/sport/live/2026/jul/04/eclipse-stakes-day-horse-racing-from-sandown-live) — Sat, 04 Jul 2026 15:33:03 GMT