Favourite Tacitus, whose late charge came up short, was second and Joevia third around the sprawling, 1 1/2-mile dirt track on a warm, sunny day.
While making his move, Sir Winston appeared to hamper Preakness Stakes victor and stablemate War Of Will, who was second favourite but faded and finished ninth of the ten runners.
Last year, Justify won the Belmont Stakes to capture the 13th Triple Crown in history. The win gave Mark Casse, a 10-time trainer of the year in Canada, a 2nd triple crown jewel after War of Will won the Preakness. No challenge came from the horse that faced the same controversy at the Kentucky Derby, possibly because the two horses shared a trainer in Casse.
Sir Winston, ridden by Joel Rosario, was a 10-1 shot coming into Saturday's race. "What can I say, it's just exciting". Justify was only the second Triple Crown victor in the past 40 years - following 2015's Triple Crown victor, American Pharoah - with a single horse not having won all three races since Affirmed did so in 1978.
The win was just the third in 10 starts for Sir Winston, who finished second in the Peter Pan Stakes at Belmont last month. Rosario guided his chestnut colt through an opening next to the rail. He went from there to his first victory in his second race and followed that up with wins in the Tampa Bay Derby and Wood Memorial before running in the Kentucky Derby.
Then the Belmont allowed itself to be simply a horse race, and a good one, with a worthy victor for worthy connections. If you had asked me to rate our two-year-olds past year he would have been 16th or 17th.
Mitole extended his winning streak to seven with a gutsy victory in the $1.2 million Metropolitan Handicap.
"They all better watch out for Sir Winston, especially at 10 furlongs". Country House was elevated to first, giving Mott his first Derby win and becoming the second longest shot (65-1) to win the Derby. Will there be an Omaha Beach sighting? "Today, he was a little closer, so I let him be where he was comfortable". "With a horse like Sir Winston, you know, it paid off there". "But one thing about it, he'll regroup".