Although two of the three newly inducted horses into the National Museum of Racing Hall of Fame who went on to stud careers failed to make a major commercial impact, both Housebuster and Lure—whose own breeding career was truncated by fertility issues—have produced Grade/Group 1 winners and successful sons at stud. Fellow inductee Invasor's second career as a stallion is still in its nascent stages.

Debates over the identity of the greatest racehorse of all time are both forever pointless and endlessly entertaining. I’ll see your 31-length Belmont win by Secretariat and raise you Frankel’s 14 straight wins. For racing’s equivalent to the hot-stove league, there is no universally valid and accepted method of comparing great horses of different eras.

California-based freshman sire Brave Cat was represented by his first winner April 25 when La Tonga equaled the track record to capture a maiden special weight at Golden Gate Fields.

The 2-year-old filly, who is owned by trainer Jeff Bonde, won by a head, completing two furlongs on the Tapeta Footings synthetic surface in :21.20.

It was the second career start for La Tonga, who was third in her debut on April 11. The filly is out of the Fit to Fight mare Ducks On the Pond.

Pierro, Australia’s champion 2-year-old colt and a five-time Group 1 winner who was retired last week, will begin his stud career at Coolmore’s Australian division in New South Wales. His initial fee will be announced at a later date.

Bold Affair, a multiple stakes winner in the Mid-Atlantic region, has been retired from racing and will be bred to Kentucky sire Ghostzapper, the Mid-Atlantic Thoroughbred reports.

Record-priced mare Havre de Grace, the 2011 Horse of the Year, has been confirmed in foal to Tapit.

The 6-year-old mare, from the only crop of 2005 Horse of the Year Saint Liam, got in foal on one cover by the Gainesway Farm stallion, Gainesway's director of sales Michael Hernon said. This would be her first foal.

"Tapit is attracting extraordinarily high-quality mares," Hernon said.

Dispute, an Ogden Mills Phipps homebred who won the 1993 Kentucky Oaks, was humanely euthanized on April 24 at Pattons Creek Farm near Goshen, Ky., due to the effects of a neurological issue. The Danzig mare was 23.

Dispute won or placed in 17 of 19 starts over three racing seasons and earned more than $1.1 million for Phipps and trainer Shug McGaughey. In addition to her Oaks victory, in which she defeated 1992 champion juvenile filly Eliza by 1 1/4 lengths, Dispute won the Grade 1 Beldame and Gazelle in 1993 and the Grade 1 Spinster in 1994.

When Giant’s Causeway was retired to Coolmore’s Irish division for the 2001 breeding season, he immediately became one of the most sought-after young sires of his era due to his excellent pedigree and his even-better ability as a racehorse.

The Kentucky-bred son of Storm Cat out of Grade 3 winner Mariah’s Storm had proven to be competitive at the highest level after relocating to Europe for the bulk of his racing career, taking on all comers at distances ranging from six furlongs to about 1 5/16 miles.

The month of April has been a productive one for the broodmare Lisa Danielle.

Last spring, owner-breeder Terry Lovingier faced a pivotal decision with Willa B Awesome, the winner of the 2012 Santa Anita Oaks.

Lovingier and his partners debated whether to run Willa B Awesome in the prestigious Kentucky Oaks at Churchill Downs or take a slightly unconventional approach with a Grade 1 winner and stay in California for the $300,000 Melair Stakes for state-breds at Betfair Hollywood Park.

In a decision based on economics and competition, they opted to keep the filly at home and watched her record her fourth and final career stakes win.