I’m comparing specific broodmare sires first, then grouping them into lines. I’ll keep the racing and yearling-sale samples separate: the sire’s results can guide a mating, but they don’t establish what an unproven son’s yearlings will bring.
My commercial shortlist
For a breeder selling as a yearling, I would start with:
- Sierra Leone: Tapit/Pulpit and Bernardini branches of A.P. Indy, followed by Unbridled’s Song/Empire Maker. These offer the clearest combination of Gun Runner racing evidence and yearling-market acceptance.
- Fierceness: Scat Daddy and War Front branches of Storm Cat, with Ghostzapper as a value-oriented alternative. Giant’s Causeway deserves consideration on racing evidence, but the available sales sample is too small to establish a commercial premium.
I would pay Sierra Leone’s additional $25,000 for a mare capable of producing an upper-market yearling—not simply because she belongs to a favorable sire line. Fierceness is more attractive when the mare’s page or physical limits the likely selling price.
These are parent-sire analogues, not proven nicks for their sons.
What the samples actually show
To make the racing comparison reasonably age-balanced, I used 2020–2022-born progeny of both sires, counting recorded runners and individual graded-stakes winners, rather than stakes wins.
For sales, I used 2023–2025 yearling transactions, with positive sold prices. I excluded RNA-indicated records—including records with conflicting sold/RNA labels—and null or zero prices. Prices below are medians, not averages.
The racing and sales samples are separate populations. “Profiles” means horses represented in Chivalry, not necessarily every registered foal.
Sierra Leone: evidence from Gun Runner
My interpretation:
- Tapit is the strongest first target. It has the largest racing and sales samples here, with four graded winners and substantial commercial acceptance. I would extend the search to Pulpit-line mares, but would not assign every branch Tapit’s exact results.
- Bernardini is the next-best balanced option. Both sides of the evidence are positive, although six runners remain a small racing sample.
- Unbridled’s Song is a credible secondary target. Nine winners from nine runners is encouraging; four sales are not enough to forecast a reliable yearling price.
- Empire Maker is commercially plausible, but not a demonstrated graded-stakes advantage in this cohort.
- Distorted Humor is an individual-mare opportunity, not a statistical first choice. Two sales cannot establish a dependable premium.
Malibu Moon needs special handling. Gun Runner’s results are attractive, but Sierra Leone is already out of a Malibu Moon mare. Breeding him to a Malibu Moon daughter produces 3×2 Malibu Moon in the foal. I would not reproduce that cross automatically just because Gun Runner succeeded with it.
Fierceness: evidence from City of Light
My interpretation:
- Scat Daddy is my first commercial screen, particularly for a mare with a strong producing family. Five winners from five runners and the highest median among these City of Light crosses are encouraging—but three sales and no graded winners make this a tentative preference.
- War Front offers somewhat broader sales support, plus seven winners from nine runners. The evidence supports a workable commercial mating, not a proven elite nick.
- Ghostzapper is a sensible value option. Six winners from six runners is useful evidence of racing functionality, but three sales at a $100,000 median do not establish high-end demand.
- Giant’s Causeway has the better-sized racing sample, including a graded winner. With only one qualifying yearling sale, I would choose on the mare’s page and physical rather than a claimed market premium.
- Tapit is not an automatic first choice for Fierceness. In this cohort, City of Light–Tapit has weaker racing and sales evidence than Gun Runner–Tapit.
The Stay Thirsty result is particularly easy to overread: Fierceness and his full brother Mentee supply the two graded winners. That is concentrated success from one mating, not two independent mare families. Fierceness himself is out of a Stay Thirsty mare, so using a Stay Thirsty daughter would also create 3×2 Stay Thirsty.
Where Sierra Leone earns the additional $25,000
Most defensible: a high-quality Tapit or Bernardini mare
I would lean Sierra Leone when the mare has:
- A strong immediate family or an established production record;
- The physical quality to produce an upper-book yearling;
- Enough speed and maturity to complement his route-oriented racing profile;
- A realistic chance of attracting buyers seeking a classic dirt prospect.
The parent-sire medians illustrate the market distinction:
These differences do not predict Sierra Leone–Fierceness price differences. Gun Runner and City of Light differ in established reputation, fees, mare quality and sale placement. Nevertheless, the Tapit and Bernardini results provide a stronger commercial rationale for paying for Sierra Leone than pedigree fashion alone.
Where Fierceness offers better value
I would lean Fierceness for:
- A good Scat Daddy, War Front or Ghostzapper mare where his juvenile achievement and tactical speed fit the intended buyer;
- A mare whose page suggests a middle-market rather than elite yearling;
- A mating where Sierra Leone’s extra fee would consume too much of the expected margin;
- A mare needing earlier maturity, provided the physical match is favorable.
At a hypothetical $150,000 selling price, the fees alone represent 50% of gross for Sierra Leone versus 33% for Fierceness, before raising costs and selling expenses. That makes the premium difficult to justify without a credible uplift in price or sale probability.
With an illustrative 5% selling commission, Sierra Leone needs approximately $26,300 more gross sale price merely to recover the extra $25,000 fee. That is a break-even calculation—not compensation for the additional capital risk.
Bottom line
Best-supported premium mating: Sierra Leone × a top Tapit or Bernardini mare.
Best tentative value mating: Fierceness × a commercially strong Scat Daddy or War Front mare, with Ghostzapper a practical alternative.
Avoid paying the premium solely for a “nick.” The strongest evidence here is Gun Runner–Tapit; most other cells are small. For a yearling seller, the mare’s production record, likely foal physical, sale placement and first-crop market reception can outweigh the broodmare-sire label.
Source: Chivalry horse profiles, race histories and sales histories. Fee comparison assumes the previously discussed $75,000/$50,000 terms; confirm actual contracts before booking.