# The 13 Most Influential Thoroughbred Sires in Racing History

> Modern pedigrees narrow to a handful of stallions, and several of them never won anything worth remembering. Influence and greatness turn out to be different lists.

*By YPB Team · Published August 20, 2026 · https://youpick.best/ranking/the-13-most-influential-thoroughbred-sires-in-racing-history*

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1. **Northern Dancer**
   Left a line of stallion sons — Sadler's Wells, Nijinsky, Danzig, Nureyev — that reshaped breeding worldwide.
2. **Mr. Prospector**
   Widely called the most influential North American sire of the last fifty years.
3. **Bold Ruler**
   Eight-time leading sire in North America, and the father of Secretariat.
4. **Nearco**
   The unbeaten Italian champion whose male line runs through most modern pedigrees.
5. **Native Dancer**
   His line reaches forward through Mr. Prospector and Raise a Native to much of today's dirt racing.
6. **Sadler's Wells**
   Champion sire in Britain and Ireland fourteen times, most of them consecutively.
7. **Storm Cat**
   Another Secretariat maternal grandson, whose stud fee reached $500,000 at his peak.
8. **Galileo**
   Sired more than 90 Group 1 winners including Frankel, and led the British sire list twelve times.
9. **Secretariat**
   Sired 57 stakes winners but no top-class stallion son; his influence arrived through his daughters.
10. **Seattle Slew**
   The undefeated Triple Crown winner sired A.P. Indy and became a cornerstone of the Bold Ruler line.
11. **Raise a Native**
   Ran four times, won four, and produced Mr. Prospector, Alydar and Majestic Prince.
12. **Sunday Silence**
   Led the Japanese sire list thirteen years in a row and rebuilt an entire national breeding industry.
13. **Tapit**
   The grey who topped the American sire list three times and stood at the highest fee in Kentucky.

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