Busy betting action produces a new favorite for the Kentucky Derby

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This means Twinspires can potentially derive more users placing more wagers, but it also wants to create loyal fans and "help people fall in love with horse racing in general", Brady said.

CLASSIC EMPIRE is the nominal favourite in what's shaping up to be a wide-open 143rd running of the Kentucky Derby, first jewel in American flat racing's coveted Triple Crown.

Former jockey Rosie Napravnik exercises Kentucky Derby entrant Girvin for her husband trainer Joe Sharp at Churchill Downs in Louisville, Ky., Thursday, May 4, 2017.

What time does it start?

Horses and jockeys are expected to hit the starting post at Churchill Downs at 6:46 p.m. ET on Saturday.

What channel is it on?

"How many horses run in the Kentucky Derby?".

Irish War Cry has demonstrated his brilliance on three different main tracks, whereas Animal Kingdom had raced exclusively on turf and synthetic surfaces prior to making his dirt debut in the Derby.

Secretariat holds the record.

Offshore at Bookmaker.eu, Always Dreaming was the favorite at +565, followed by Classic Empire at +595, Irish War Cry at +685 and McCraken at +705. For the third consecutive year, the 5-year-old son of Kitten's Joy rallied to take a grass stakes on Derby Day.

One-eyed Patch aiming for glory in $2.4 million race.

Once a race in which anything could happen and any horse could win, the Kentucky Derby has been all too predictable the past four years. Thunder Snow was the 13th horse from that prep race to advance to the Kentucky Derby, and none of those contenders has ever finished better than fifth on Derby Day. Let's just enjoy the ride."Always Dreaming had been fractious in morning workouts leading up to the Derby".

Pletcher knows what he's talking about - he's trained more Derby horses than anyone in history. "And another 'dog that the pros like is Fast & Accurate versus State of Honor".

He paid $32 to win at 15-1 odds. "You need so many things to go right and the good news with this horse is he's so talented he can overcome a lot".

Churchill Downs, home to the Kentucky Derby, is a publicly traded company.

Enter Patch. A name given to him before his left eye was removed due to an ulcer that would not heal. However, since 2000, only three colts who have claimed that prize have gone on to win the Derby the following season.

Patch's trainer, Todd Pletcher, also has two other horses in the race, 5-1 shot Always Dreaming, and 20-1 odds Tapwrit. He's won over 4,200 races in a career that began at age 7, cooling out horses for his father.

Who is singing the national anthem?

Editor's note: As a student at Northwestern University in 1989, I was fortunate to have joined several friends on a trip to Louisville for the Kentucky Derby.