How Gun Runner Became Keeneland's Yearling King

For a long time, Into Mischief owned Keeneland September.

From 2020 through 2023, he led the entire sale by gross four years in a row. His 57 yearlings brought $25.4 million in 2020. The total reached roughly $26 million in 2021 and $30.5 million in 2022. Then came 2023, when 53 Into Mischiefs sold for nearly $37 million, including 12 seven-figure yearlings. Keeneland called it the highest September gross by a sire since Storm Cat in 2005.

He had become the commercial stallion everyone else was measured against. Buyers knew the stock, breeders knew there would be an audience, and his runners kept supplying reasons for both groups to remain confident.

Gun Runner was already becoming one of the best stallions in America during much of that run. His position in the yearling market took longer to catch up.

That delay tells us a lot about how a stallion actually rises through the commercial ranks.

Into Mischief Still Had Daylight in 2023

We have been looking closely at Books 1 and 2 because that is where the competition among the elite commercial sires is easiest to see.

In 2023, Into Mischief still had Gun Runner covered in every major category.

Book 1 was even more lopsided. Into Mischief grossed $28.3 million there in 2023. Gun Runner grossed $6.6 million.

Only three years ago, Into Mischief generated more than four times as much Book 1 revenue as Gun Runner.

By then Gun Runner's runners had already established him as an elite sire. The yearlings arriving at Keeneland still reflected mating decisions made before much of that evidence existed.

The Market Was Two Years Behind the Racetrack

Gun Runner's first runners arrived in 2021 and answered the important questions quickly.

Echo Zulu won the Spinaway, Frizette and Breeders' Cup Juvenile Fillies. Gunite won the Hopeful. Pappacap and Wicked Halo added graded races. Gun Runner led the freshman sire class and his fee moved from $50,000 to $125,000.

The following season added Taiba, Cyberknife, Early Voting and Society to the Grade 1 group. By late 2022, he had six Grade 1 winners from his first crop.

Breeders responded. The Jockey Club recorded 256 mares bred to Gun Runner in 2022, the largest book in North America that year.

The timing matters because the 2022 matings did not reach Keeneland as yearlings until 2024.

The 2023 yearlings were conceived before Gun Runner's first crop had shown what he could do. The 2024 yearlings came from the first mating season in which breeders had real racing evidence in hand.

By 2025 and 2026, the yearlings entering the sale had been conceived when Gun Runner was already one of the most expensive stallions in Kentucky and breeders were sending him a much stronger population of mares.

The worldwide yearling results show the progression clearly. In 2024, 83 yearlings averaged $522,361 with a $400,000 median. In 2025, 57 averaged $871,420 with a $650,000 median. This year, 75 have averaged $901,323 with the same $650,000 median.

The racing market figured Gun Runner out first. The breeding cycle needed several years to put the resulting product into the sales ring.

Into Mischief's Standard Was Extraordinary

Any discussion of Gun Runner taking over the premium yearling market needs to give Into Mischief his due.

His 2025 Stallion Register record showed 1,508 runners and 1,085 winners, roughly a 72 percent winner rate. He had 183 black-type winners, about 12.1 percent of runners, and 27 Grade 1 winners.

Gun Runner's corresponding 2025 record contained 421 runners, 285 winners and 48 black-type winners. His winner rate was about 67.7 percent and his black-type-winner rate about 11.4 percent.

Into Mischief was therefore producing winners and stakes winners at slightly higher rates while operating across a population more than three times as large.

That scale is part of what made his run at the top so exceptional.

Gun Runner's strongest statistical edge showed up farther up the quality ladder. He had 12 Grade 1 winners from 421 runners, roughly 2.85 percent, compared with 27 from 1,508 runners for Into Mischief, about 1.79 percent.

Gun Runner also had the benefit of a stronger mare population. His Comparable Index was 2.60, compared with 1.81 for Into Mischief, so the difference in Grade 1 production should not be treated as a pure stallion-only effect.

What buyers had seen was an unusually dense concentration of elite outcomes from Gun Runner's early crops.

Into Mischief had already demonstrated extraordinary reliability at enormous scale.

Both are elite sire profiles. They gave the top of the yearling market different reasons to pay.

2024 Was the Handoff

The 2024 Keeneland results show the transition clearly.

Into Mischief still had the slightly higher average and median. Gun Runner had caught him on price and built a much larger market around that price level.

Keeneland offered 69 Gun Runners in the first two books. Fifty-eight sold, an 84 percent sale rate, and the group generated almost $10 million more gross than the Into Mischiefs.

That was the first real shift in leadership. Gun Runner moved ahead through volume, liquidity and seven-figure depth while the typical sold Into Mischief still brought slightly more.

Across the full September sale, Gun Runner finished as the leading sire by gross for the first time.

Into Mischief's four-year run at the top had ended.

2025 Was the Repricing

The following year made the change much harder to miss.

Gun Runner and Into Mischief had almost exactly the same number offered in Books 1 and 2, 41 and 42 respectively.

The price distributions separated sharply.

The $932,917 average was exceptional. The $825,000 median says more about how completely the market had moved.

Half of the reported Gun Runner sales in the first two books brought at least $825,000. A few trophy horses cannot create that kind of median.

His colts topped all four opening sessions, and the broader Stallion Register sales record later showed a $921,321 yearling average through early November.

By this point buyers were pricing the group differently, not simply paying up for two or three obvious horses.

2026 Tested the Depth

This year's sale posed another question. Keeneland had substantially more Gun Runner inventory to absorb.

The number offered in Books 1 and 2 jumped from 41 to 58, an increase of 41 percent.

Some pressure showed up through the middle of the group. The average eased 7 percent and the median came back from the exceptional $825,000 level of 2025.

The top end continued to expand.

Into Mischief's sold yearlings had the higher average and median this year. His best horses remain among the most valuable yearlings at Keeneland, including the $3.7 million colt out of Grazie Mille that topped the first two books.

Gun Runner's advantage now sits in the size of the premium market surrounding him. He put 58 horses into Books 1 and 2, sold 46, produced 15 seven-figure yearlings and generated almost $40 million.

The market absorbed 17 more Gun Runners than it had the year before and still produced a higher gross and more million-dollar horses.

That is a considerably harder test than maintaining a giant average with a scarce crop.

Figure 1 · The handoff

Four years to close a $304,000 gap

Show the data

Year	Gun Runner average	Into Mischief average
2023	$449,500	$753,830
2024	$545,948	$570,526
2025	$932,917	$660,294
2026	$865,109	$882,000

Book 1 Shows How Far the Market Moved

The change becomes especially clear at the very front of the sale.

In 2023, Into Mischief generated more than four times Gun Runner's Book 1 gross.

Three years later, Gun Runner generated almost twice as much.

The catalog moved at the same time. Gun Runner went from 27 Book 1 yearlings cataloged in 2022 to 47 this year. Into Mischief went from 51 to 29.

Book 1 placement reflects several judgments before a horse ever enters the pavilion. Breeders choose the mating, the yearling develops, consignors decide where the horse fits, and Keeneland builds the book.

Over the past five years, more of those decisions have put Gun Runner at the very front of September.

Buyers have supported the move.

The 2026 Book 1 numbers are especially telling. Thirty-four Gun Runners were offered, 25 sold through the ring for $27.6 million, and the sold group averaged $1.104 million with a $900,000 median.

The 2025 Book 1 median was also $900,000.

More supply arrived and the middle of the successful Book 1 population held.

Clearance weakened, although even that requires some context. The remaining Book 1 RNAs carried a median reported bid around $950,000. Sellers were taking Gun Runners home after bids that would constitute major sales for most sire groups.

Book 2 is where the larger supply produced more noticeable price and clearance pressure.

That is what we would expect from a sire market beginning to differentiate more sharply among individuals.

The Colt Market Has Become Something Else

The sex split adds another layer.

In the 2026 worldwide yearling results, 42 Gun Runner colts have averaged more than $1.06 million. Thirty-three fillies have averaged about $697,000.

The gap was already substantial last year, when colts averaged roughly $960,000 and fillies about $708,000.

Some of that is ordinary colt premium. At these prices, stallion potential is clearly part of the calculation too.

Cyberknife, Early Voting and Gunite are already at stud. Sierra Leone added another major stallion prospect to the line. Gun Runner's current leading runners continue to include the kind of colts buyers hope they are buying when they spend seven figures at Keeneland.

The market is therefore paying for more than the chance to own a good racehorse. A top Gun Runner colt can carry substantial value into a second career, and buyers are pricing that possibility accordingly.

The Runners Keep Supporting the Market

Gun Runner's current Stallion Register record shows 41 graded black-type winners, 63 black-type winners, three champions and nearly $99 million in Northern Hemisphere progeny earnings.

His 2026 three-year-old crop has added another group of horses in exactly the races commercial buyers care about. Always a Runner won the Kentucky Oaks, Further Ado won the Blue Grass, Leading Change won the Travers and My Gun's Loaded won the Alabama.

That type of racing record keeps supporting the prices breeders and buyers are willing to attach to the next crop.

It also helps explain why the Gun Runner colt market has become so expensive. The evidence is arriving in the races that create future stallions as well as valuable racehorses.

A Succession at Keeneland

Into Mischief's position at Keeneland was built over years, and nothing in these numbers diminishes what he has done. His ability to produce winners and black-type horses at exceptional rates across a huge population remains one of the defining stallion records of the era.

Gun Runner's rise followed a different path. His early crops produced an unusually dense group of Grade 1 horses. Breeders responded with larger and more expensive books, and the resulting post-proof yearlings began arriving at Keeneland in 2024.

That was the first year he moved ahead on market depth.

In 2025, the whole price distribution shifted.

The 2026 sale may provide the strongest evidence yet that the change has staying power. Keeneland had substantially more Gun Runners to absorb, and buyers still spent nearly $40 million on them in the first two books, including 15 seven-figure yearlings.

Three years ago, Into Mischief generated more than four times Gun Runner's Book 1 gross.

This year Gun Runner generated almost twice as much.

That is a remarkable shift in a very short period.

Thoroughbred Intelligence analyzed hip-level Keeneland September results from Books 1 and 2 for 2023 through 2026, with Book 1 comparisons extended through 2022. Reported sale rate includes identifiable post-sale transactions and excludes withdrawals. Mare-book and fee history comes from our Kentucky stallion pipeline and published breeding records. Lifetime runner statistics for Gun Runner and Into Mischief use comparable 2025 Stallion Register snapshots. Current Gun Runner racing statistics are through September 2026.