Ranger Up (10) at 5-1 won the fifth race at Gulfstream to start the Sunday Rainbow 6.
The carryover coming in was $293,509. Bettors added $203,875 to the Rainbow 6.
That adds up to a jackpot of just over $497,000. Gulfstream is guaranteeing that today's jackpot pool will be at least $500,000 if there is just one ticket with all six winners.
In that case, Gulfstream will need to add just under $3,000 to the pool.
If there are multiple tickets with all six winners Gulfstream will take out 20 percent of the day's Rainbow 6 bet, It will then divide 56 percent among the winning tickets and add 24 percent to the carryover.