His employers RaceTech said in a statement: "Following a tragic accident today our dear friend and colleague Stephen Yarborough sadly passed away following serious injuries incurred in his role of Team Leader of the Starting Stalls
at Haydock Park Racecourse.
Horse Racing Ireland (HRI) has now established a framework for the supply new Starting Stalls
use at numerous racecourses over the Flat Racing Calendar.
Turbo Linn still needs the kid glove treatment at the start but at least she got into the starting stalls
unlike another favourite, Escape Route, who dumped jockey Robert Havlin and had to be withdrawn before the mile handicap.
After Wednesday morning's double-blind drawing had assigned starting stalls
to seven of the nine Belmont Stakes horses, the presiding track officials had yet to call out the name Smarty Jones, leaving the fates with a choice of extremes for the Triple Crown hopeful.
It was a day to forget for Dettori who lost his irons leaving the starting stalls
on 7-2 chance Auratum in the Chatwell Fillies' Stakes which was won by Hot Tin Roof.
Merseyside Police reported Yarborough "was pronounced dead at the scene" after being run over by the starting stalls
before the fourth race on Haydock's Friday card.
The second Classic of the season was delayed for nearly 30 minutes after the filly, owned by Raymond Mould, tried to escape beneath the starting stalls
and became stuck.
After a great start at the opening fixture of the year on Monday, the starting stalls
will be flying open again on Easter Monday.
His career got off to the perfect start with a taking victory in a Newbury maiden last September, but he had failed to build on that promise subsequently, showing a dislike to starting stalls
on more than one occasion.
ON television recently I saw the top American economics expert Alan Greenspan, looking like he had just seen the four horsemen of the apocalypse being loaded into the starting stalls
, warning of a global economic tsunami.
Favourite Notable Guest got upset in the starting stalls
and finished last.
RACING at Hamilton Park yesterday was thrown into chaos after a section of the starting stalls
overturned after the fourth race.