Champion Shanghai Bobby sustained a pelvic stress fracture exiting his subpar fifth in the March 30 Florida Derby, co-owner Starlight Racing announced Thursday.
The Todd Pletcher pupil had already been ruled out of Kentucky Derby consideration following that last race at Gulfstream Park. Although no specific physical ailment came to light at that time, connections preferred to rest him in advance of a late summer and fall campaign.
Now that his exact injury has been diagnosed, Dr. Larry Bramlage estimates a 90-day rest period and expects a complete recovery.
"Although it is disappointing that Shanghai Bobby has sustained this injury," Pletcher said, "perhaps this offers an explanation of his performance in the Florida Derby."
Shanghai Bobby streaked through his two-year-old season undefeated, including victories in the Hopeful, Champagne and Breeders' Cup Juvenile.
A near-unanimous selection as champion two-year-old colt of 2012, the son of Harlan's Holiday suffered his first loss in his reappearance in the January 26 Holy Bull. He still ran a terrific second to Itsmyluckyday, who broke the track record for 1 1/16 miles at Gulfstream.
Shanghai Bobby stalked the pace in the Florida Derby, but uncharacteristically retreated and was beaten a total of 10 3/4 lengths by Orb. He has amassed $1,797,000 from his 7-5-1-0 record.
Starlight Racing originally purchased Shanghai Bobby for $105,000 at the 2011 Keeneland September Yearling Sale. Prior to the Breeders' Cup, they sold a 50-percent share to Coolmore principals Mrs. John Magnier, Michael Tabor and Derrick Smith.
Coolmore's North American arm, Ashford Stud near Versailles, Kentucky, stands the three previous champion juvenile colts -- Lookin at Lucky (2009), Uncle Mo (2010) and Hansen (2011).