All Triple Crown races are restricted to 3 year olds only.
They are 3 years old. All horses are officially a year older every January 1st. So, regardless of the date of their birth, the Triple Crown races are for 3 year olds.
Because the Kentucky Derby is for horses classified as three years old. This means they can only run once, when they are three years old.
Inside Information - 2006 Alysheba Triple Crown's 30th Anniversary 1978 Triple Crown Run 2-9 was released on: USA: 2008
The Triple Crown, or respectively the Kentucky Derby, The Preakness, and The Belmont Stakes, are exclusively for three-year-old Thoroughbreds. Because the distance increases with each race it is harder for the horse to complete The Triple Crown. Last winner was 'Affirmed' in 1978, he was euthanized at the age of twenty six after an injury to his pastern caused him to suffer from laminitis. And actually, most of the horses that have run these races live well into their teens and many lived well into their thirties.
The longest race of the Triple Crown is the Belmont Stakes run at 1 1/2 miles (12 furlongs).
The selection of horses to run in the Triple Crown begins with horses meeting what are called "race conditions" for the Kentucky Derby; conditions stipulate the age, gender and past performance requirements each horse must meet to enter a given race. The Kentucky Derby is written for 2 year-olds, fillies and colts, [here it says something like "...non-winners of x number of races..." and/or "winners of x number..."] The winner of the Kentucky Derby gets to run in the Preakness, and the winner of the Preakness gets to run in the Belmont. So the "selection process" begins with being eligible to run the Derby.
The Kentucky Derby, The Preakness Stakes and the Belmont Stakes. Only 11 horses have ever won all three.
A triple crown winner is one who wins the batting average title, the runs batted in title and the home run title all in one season. The last triple crown winner was Carl Yastrzemski in 1967. A Triple play occurs in baseball when a team records three outs on a single play. The last triple play was Troy Tulowitzki's unassisted triple play on April 29, 2007. Pitchers also have a triple crown. A triple crown pitching winner leads the league in wins, strikeouts, and ERA.
None. Fillies usually do not run quite as fast as colts, although there have been filly winners in some of the Triple Crown races, but none have ever won the crown.
The answer to this and all the rest of the stats can be found at the Kentucky Derby's website.
As of the date this question was asked -- May 14, 2010 -- the only leg of the Triple Crown that has been run is the Kentucky Derby, on May 1, 2010, won by Super Saver.
the New York Handicap Triple or American Graded Stakes Races for thoroughbred racehorses is run by the New York Racing Association at Belmont Park in Elmont New York. these three races consist ot the Metropolitan Handicap, the Brooklyn Handicap and the Suburban Handicap. the four horses that have won the Handicap Triple Crown are Whisk Broom 2 in 1913, Tom Fool in 1953, Kelso in 1961 and Fit to Fight in 1984.