Constitution, unstarted as a juvenile, won the first three starts of his career, including the 2014 Florida Derby in just his third outing. His offspring are proving similarly quick studies. 

There weren’t many takers the three times Concrete Rose went through the auction ring. The most the filly fetched in those outings was a relatively modest $61,000 when sold to her current connections as a juvenile. 

That now looks like a rock-solid investment. Concrete Rose is now a millionaire, with victories in six of her seven starts for earnings of $1,218,650.

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Into Mischief, powered by Grade 1 Test Stakes winner Covfefe, took over the top spot on the general sire list for the first time in his career over the weekend. Through Sunday, the Spendthrift Farm stallion has earnings of $10,316,277. Quality Road, who began the season with City of Light’s victory in the rich Pegasus World Cup Invitational, sits second at $9,636,174, with perennial leading sire Tapit also closing in on the top two at $9,526,970. 

In recent years, the club model of Thoroughbred ownership has grown in popularity in order to attract new owners to Thoroughbred racing, offering interested parties to buy a small share in a horse with a small single payment, offering ownership experiences with no additional costs – but also few, if any, financial rewards.

Three-time Eclipse Award champion Royal Delta, who will be inducted into the National Museum of Racing and Hall of Fame on Friday in Saratoga, had a star-crossed career as a broodmare, producing just one foal, on Feb. 1, 2017, before dying due to complications from that delivery. That Galileo filly, raised by a nurse mare, has been named Delta’s Royalty and is currently an unraced juvenile.

Deep Impact, a two-time Japanese Horse of the Year and one of the world's leading sires, was euthanized Tuesday at age 17. The son of Sunday Silence, an American dual classic winner who became a breed-shaping sire in Japan, was one of several sons of the legendary stallion ably carrying on his legacy, starting his career as Japan's leading freshman sire of 2010 before leading the general sire list each year since 2012.

It would be enough for a broodmare to have one undefeated stakes winner in training, but Magical World has two. The mare’s juvenile daughter Magic Dance could start in the Grade 2 Adirondack this Sunday at Saratoga, attempting to join older half-sister Guarana as a graded winner at the meeting. Both race as homebreds for Three Chimneys Farm.

When it comes to sons of international titan Galileo at stud, much of the discussion naturally turns to Frankel. The unbeaten two-time European Horse of the Year is off to a stellar start in his stallion career, with 45 stakes winners to date from his first four crops.

Yet one of Frankel’s old rivals and another son of Galileo, Nathaniel, has given European racing one of its most dazzling stars since Frankel in his daughter Enable, who added another major victory Saturday in the Group 1 King George VI and Queen Elizabeth Stakes, a race her sire won in 2011.

The late Harlan’s Holiday sired a pair of standout juveniles in Eclipse Award divisional champion Shanghai Bobby and Grade 1 winner Into Mischief. Both of those have continued on to produce precocity and speed, continuing to carry on their sire’s line. Both had a solid weekend, as Shanghai Bobby’s son Shancelot dazzled winning the Grade 2 Amsterdam Stakes at Saratoga, while leading sire Into Mischief was represented by promising juvenile debut winners on both coasts.

Roaring Lion, the Kentucky-bred who earned the 2018 Cartier Award as Europe's Horse of the Year, underwent emergency colic surgery Saturday in New Zealand and will miss the Southern Hemisphere breeding season.

In a release posted at 11 a.m. Sunday morning in New Zealand’s local time, Cambridge Stud, which was expected to stand the shuttle stallion this season, reported that Roaring Lion had made a “favourable recovery” in the first 24 hours post-surgery.