Distance and weather.
Those are the two biggest X-factors in horse racing's Triple Crown races each year.
Justify won the Kentucky Derby on a sloppy, wet track Saturday at Churchill Downs in Louisville, Kentucky.
For the first time since 1882, a colt won the Derby after not racing as a 2-year-old.
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Next up is the Preakness Stakes on May 19 followed by the Belmont Stakes on June 9.
While no one can control the weather, the race distance is important.
The Derby was over 10 furlongs. The Preakness is 9.5 furlongs and the Belmont is 12 furlongs.
Plus there are always new challengers. There will be horses that didn't run in the Derby, but will enter the Preakness.
It takes a special horse to win all three races.
Is Justify that horse?
Justify is the early 1-to-2 odds favorite, according to Bovada, to win the Preakness and claim the second leg of the Triple Crown. The colt began racing in February and is 4-0.
My Boy Jack, co-owned by former TCU baseball player Kirk Godby, is expected to skip the Preakness to run in the Belmont. If My Boy Jack enters the Preakness, the odds are 16-1..
Here's how Bovada sees the Preakness Stakes:
Good Magic 9-2
Diamond King 16-1
Runaway Ghost 18-1
Sporting Chance 33-1
Noble Indy 66-1