Into Mischief was retired to stud at Spendthrift Farm for a fee of $12,500 for the 2009 season. In order to build support, Hughes offered a lifetime breeding right to breeders who completed "stands and nurses" contracts in each of his first two years at stud. Interest in him was moderate, and his stud fee dropped to $7,500 by 2012. Into Mischief's first crop reached racing age in 2012. His first winner was Avalon Rose, who won a five-furlong maiden race on July 5. His first stakes winner was
Goldencents, who won the
Delta Downs Jackpot Stakes. From a small crop that contained just 21 starters, Into Mischief finished third on the North American first-crop sire list. Two members of his first crop, Goldencents and Vyjack, were starters in the
2013 Kentucky Derby. Commenting on Into Mischief's unexpected success at stud, Hughes said "We don't really know what we have. We might have
Mr. Prospector; it's not knowing." With the on-track success of that first crop, Into Mischief began to attract more recognition. The crop he sired in 2013 reached racing age in 2016 and started to move Into Mischief steadily up the North American stallion ranks. In 2018, Audible became his first offspring to be in the money in a Triple Crown race, finishing third in the Kentucky Derby. In 2019, Into Mischief was the
leading sire in North America, with Eclipse Award-winning filly Covfefe being his leading performer. His offspring are generally known as sprinters, although his more recent crops contain horses who are able to contend at longer distances.
Authentic became his first
Classic winner in the
2020 Kentucky Derby. Into Mischief was again the leading sire in North America in 2020 with record progeny earnings of over $22 million. Into Mischief led the North American sire list for the third straight year, breaking his own progeny earnings record in the process. His stud fee for 2022 was set at $250,000. He earned his fourth straight earnings title in 2022, again breaking his earnings record. As of the 2026 breeding season, his stud fee remained at $250,000.
Stallion statistics Notable progeny His Grade I stakes winners include:
c = colt, f = filly, g = gelding Into Mischief is the grandsire/damsire of Grade I winners and millionaires: ==Pedigree==