Midshipman, trained by Bob Baffert and ridden by Garrett Gomez, made every yard of the running to win the Breeders' Cup Juvenile.
Running in the famous maroon and white silks of Sheikh Mohammed he held off the late challenge of Square Eddie, formerly trained by John Best and now with Doug O’Neill.
After setting a steady pace early, Gomez quickened it up turning into the straight and won his third race of the weekend.
David Wachman’s dual Group one winner Bushranger never landed a blow under Murtagh.
William Hill quote Midshipman at 12-1 for 2009 Kentucky Derby glory, with the runner-up a 16-1 chance.
Gomez said: ``He made it easy. At the first turn (Street Hero) was right inside me and my idea was to get over with the speed. If I got first run I thought I might beat him.''
Baffert added: “I told Garrett to break well and shake everybody off, get a clear run and a good position. He worked him the other day which was a good move. It takes a good horse to win this.”
Murtagh said: ``There was a lot of speed in the race but I don't think he stayed.
“I was a little bit disappointed with him.”
Midshipman held on by a length and a quarter and a delighted John Ferguson, Sheikh Mohammed's bloodstock advisor, said: ``It's very exciting. His future is obviously up to Sheikh Mohammed, who owns Darley Stables.
“Bob has done a fantastic training job, Garrett gave the horse a beautiful ride and I’m just thrilled for everybody at Darley and Stonerside where the horse was bred and which we recently acquired.
“Obviously we were hopeful, but never in our wildest dreams did we think we’d be standing here.”