Derby day, by the numbers:

• Post time is 6:46 p.m. EST.
• Distance: 1 1/4 miles.
• Purse: $2 million.
• 120,000: The average number of mint juleps sold during the Derby every year, per CNBC.
• 150,000+: The expected attendance.
• 20 horses in the prime-time race: Firenze Fire, Free Drop Billy, Flameaway, Good Magic, Audible, Promises Fulfilled, Lone Sailor, Justify, My Boy Jack, Hofburg, Enticed, Bolt d'Oro, Mendelssohn, Bravazo, Vino Rosso, Magnum Moon, Solomini, Instilled Regard, Combatant, and Noble Indy.
• 5-1 odds: Where My Boy Jack sits — up from 20-1 after rain factored into the race, according to the Business Insider. My Boy Jack has "a proven record on a muddy track," pulling him up to a second place favorite behind Justify.
• 99-1 odds: Instilled Regard sits in last place.