Mage is a
chestnut colt bred in Kentucky by Grandview Equine. His sire
Good Magic was the
U.S. Champion Two-Year-Old in 2017 after he won the 2017
Breeders' Cup Juvenile as a maiden; in 2018 he finished second in the
Kentucky Derby. His dam,
Puca, is a daughter of
Big Brown. Mage was initially sold for $235,000 to New Team from the Runnymede Farm consignment at the 2021 Keeneland September Yearling Sale. Mage is the second black-type horse out of his dam's four foals, the other being a stakes-placed
Gun Runner filly named Gunning. Mage's full brother
Dornoch is also a grade-I stakes winner, having won the
2024 Belmont Stakes. The dam, a stakes-winning half sister to Grade I winner Finnegans Wake, also has colt by McKinzie named Baeza, who finished 3rd in the 2025 Kentucky Derby. He is trained by Gustavo Delgado, a four-time
Venezuelan Triple Crown-winning trainer. Commonwealth Thoroughbreds is a micro-shares partnership that formed after Restrepo and Delgado acquired the colt above their initial budget from the Sequel Bloodstock consignment at Fasig-Tipton's Midlantic Two-Year-Olds in Training Sale in May 2022, having cost $290,000. ==Career==