Grade II winner Williamstown and 11-year-old Pin Stripe will stand at Fred and Wade Feuring's Rockin' River Ranch near Winterset, Iowa.
A 17-year-old son of Seattle Slew, Williamstown has sired 15 stakes winners, including graded winners Eze and Vinemeister. His runners have earned $11.8 million.
Williamstown, who is out of the Northjet mare Winter Sparkle, will stand for $2,500. He formerly stood at Metropolitan Stud in New York.
Pin Stripe, who was represented by several 2006 winners, is a winning son of Mr. Prospector out of the grade I-winning Blushing Groom mare Too Chic. Pin Stripe is a full brother to champion Queena, dam of successful young sire Brahms, and to grade I winner Chic Shirine.
Pin Stripe, who formerly stood at Pin Oak Lane Farm in Pennsylvania, will stand for $1,250.