"The rise of Into Mischief has been special to witness, and there's every indication that the best is yet to come. We genuinely believe he's the best sire in the world, and is on the verge of becoming an important sire of sires," said Ned Toffey, general manager at Spendthrift.
"I don't know if we've seen anything quite like Into Mischief, it's truly remarkable the things he's doing."
"This year over 96% of his mares checked in foal. We think Into Mischief is making a positive impact on the breed that will be felt for years to come."
Into Mischief, by Harland's Holiday, is the leading sire in the US in 2019 by prizemoney with $US12,779,193 in progeny earnings – more than a million ahead of second placed Tapit.
Into Mischief also has sired the most black type runners with 45 and G1 horses with eight to date in 2019 led by his newest G1 winners Mia Mischief and Covfefe.
He is also making an impact as a sire of sires with Goldencents, his first son to enter stud and also standing at Spendthrift, the leading second crop sire in North America in 2019.
Another of his sons Maximus Mischief, undefeated as a 2YO in 2018, will join the Spendthrift roster in 2020.
He may be one several new shuttle sires on the horizon for Australia after Spendthrift announced five new stallions for the 2020 breeding season including Breeders' Cup Classic contender Vino Rosso and five-time Graded stakes winner Coal Front.
Spendthrift, owned by B. Wayne Hughes, also has US Horse of the Year contender Mitole and Arkansas Derby winner Omaha Beach joining the 2020 roster with all possible stallions that could shuttle to its Australian arm in Victoria in future seasons.
"There is obviously a tremendous amount of history at Spendthrift and it's long been a goal of Mr. Hughes to return this great farm to its days as a premier stallion operation. We believe we are doing that," said Toffey.
"The addition of these five new horses will greatly complement our stallion roster and is representative of our commitment. It is the finest group we've had the privilege to bring in and the best this storied farm has seen in decades."
Spendthrift acquired the breeding rights to Vino Rosso, a G1-winning son of Curlin, from owners Mike Repole and Vinnie Viola.
Winner of this year's G1 Gold Cup at Santa Anita, Vino Rossie is being pointed to the Breeders' Cup Classic before he' retires to stud.
Trained by Todd Pletcher, Vino Rosso has earned $1,353,125 from five wins in 13 starts. He is out of the Street Cry mare Mythical Bride, a half-sister to several G1 performers including Commissioner.
Coal Front, also trained by Pletcher, is a five-time graded stakes-winning millionaire by Stay Thirsty and is being aimed at the G1 Breeders' Cup Mile and G1 Cigar Mile prior to retiring to stud.
Omaha Beach and Mitole are also in training and gearing up for the Breeders' Cup prior to retiring to Spendthrift.