Keeneland has announced that five horses — sons of Into Mischief, Vekoma and Yaupon and two colts from the final crop of Uncle Mo — have been supplemented to Book 1 of the September Yearling Sale on Sept. 14-15. All are consigned by Taylor Made Sales Agency, agent. Click here for the September Sale catalog.

Opening day of the September Sale will include these supplements:

• Hip 182 is a colt by Yaupon out of the Violence mare Rise Above, a half-sister to Grade 1 winner Twilight Eclipse and Grade 3 winner Grand Contender.
• Hip 183 is a colt by Uncle Mo who is out of the winning Bernardini mare Positively Royal. A half-brother to stakes-placed winner Roman Empire, he is from the family of Group 1 winner Miserden and Grade 1 winner and sire Eddington.

Yearlings supplemented to the second day are:

• Hip 374 is a colt by Uncle Mo who is the first foal of Lafertiti, by Pioneerof the Nile. He is from the family of Grade 1 winners Bast and Fault and Grade 2 winner Mananan McLir.
• Hip 375 is a colt by Into Mischief out of the Grade 3-placed winner Golden Domer, by Quality Road. He is from the family of Kentucky Derby (G1) winner Mine That Bird and Grade 1 winners Bolo and Dullahan. Taylor Made consigns the colt as agent for Spendthrift Farm.
• Hip 376 is a colt by Vekoma who is the first foal of the Arrogate mare August Bloom, a half-sister to Grade 2 winner Faypien.

With the supplements, a total of 4,640 horses have been cataloged to the September Sale, which runs 12 sessions through Saturday, Sept. 26.

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Last year’s September Sale was the world’s highest-grossing Thoroughbred auction in history with more than $531.7 million in sales for 3,078 horses. The number of million-dollar horses (56) along with the average price ($172,755) and the median price ($80,000) all set records for the sale.