Kentucky Derby winner and champion Street Sense, who has sired two Grade 1 winners this season, will return to Darley's Jonabell Farm near Lexington, Ky., after standing the 2013 season at the operation's Japanese location. A stud fee will be announced at a later date.

Grade 3 winner Winslow Homer, retired earlier this year, will stand the 2014 season at Brent and Crystal Fernung’s Journeyman Stud in Ocala, Fla. A stud fee will be announced at a later date.

Grade 1 winner I Want Revenge will enter stud next year at Ben and Elaine Walden’s Pauls Mill Farm in Versailles, Ky., marking a return to the stallion business for that operation.

Less than two months after siring his first career winner, in Korea, multiple Grade 2-winning millionaire Cowboy Cal was represented by his first U.S. winner, as Tachi scored a solid maiden win in his second career outing Aug. 27 at Indiana Downs.

Grade 2 winner O’Prado Again has been retired, and will begin his stallion career in 2014 at Darby Dan Farm in Lexington, Ky.

The 4-year-old son of El Prado will stand for an advertised fee of $5,000 and will participate in the farm’s Share The Upside program. Participating breeders will receive a lifetime breeding right to O’Prado Again after breeding twice to the sire - sending two mares in 2014 or one mare in both 2014 and 2015 - producing two live foals, and paying both stud fees.

Courtesy Ballena Vista FarmTribal Rule

One week after a broken weight-bearing pin complicated St Nicholas Abbey’s recovery from a fractured pastern, the 6-year-old Montjeu horse and six-time Grade/Group 1 winner has had what Coolmore Stud declared “his best week since his initial surgery.”

Grant Williamson has been hired to join the marketing and sales team at Frank Stronach’s Adena Springs. Williamson will be based at the operation’s Paris, Ky., location, but will promote Adena stallions in all locations.

Williamson, a native of England, has nearly 20 years of experience in the Thoroughbred industry. Most recently, he was the stallion director at Vinery, Ltd. He now joins Adena’s team of sales and breeding specialists that includes Jack Brothers, Cormac Breathnach, Liam O'Rourke and Tony Gattellaro, all available to assist with mating selections.

Stonewall Farm in Midway., Ky., once home to such stallions as Medaglia d’Oro and Leroidesanimaux, has sold for $7.5 million to an entity called Stonewall Dominion LLC, according to the Paulick Report.

Lethal Force, a multiple Group 1-winning sprinter, has been purchased by Cheveley Park Stud and will begin his stallion career at the English farm in 2014.

The 4-year-old son of Dark Angel will remain in training with Clive Cox for the remainder of this year, and he will continue to race under the colors of Alan Craddock, Racing Post reports. Lethal Force is entered in Saturday’s Group 1 Haydock Sprint Cup at Haydock Park.