Edgard Zayas rode four winners and Miguel Vasquez rode three winners on Gulfstream Park's 11-race card on Saturday.
Those results raised Zayas's leading total to 104 at Gulfstream's s[ring/summer meet.
His victories included Tatweej in the day's feature tenth race (details below).
Vasquez is in second place with 100 victories, and Jaramillo is third with 96.
On Sunday, Jaramillo will finish a four-day suspension for what stewards found to be a recent riding infraction.
Sunday is the 86th day of the 107-day spring/summer meet, which is scheduled to end Sept. 27.
First post is 12:00 p.m. for a ten-race card.
Conditions are listed as Fast and Firm.
Zayas is scheduled to ride in nine of those races, and Vasquez is scheduled to ride in six races.
Gulfstream will be dark this Monday through Wednesday.
It will resume racing Thursday with nine races and first post of 12:00 p.m.
On Sunday, Zayas and Vasquez are each scheduled to ride in six races and Jaramillo is scheduled to ride in seven races.
*The only Sunday carryover is $234,508 on the Rainbow 6.
The 20 cents per combination-only bet is on races five to ten, with the sequence scheduled to start at 2:02 p.m.
The Weather Channel forecast is for the chance of rain to increase from 15 percent to 40 percent during racing hours.
There are no stakes races on the card.
Sunday's ninth race is a $25,000 optional claimer at one mile on turf for 3-YO and up. The purse is $47,000. Scheduled post is 4:14 p.m.
There are ten entrants, including Alurstra and Il Faraone entered for main track only.
On turf, Battle of Blenheim and Over the Channel are likely favorites. Each has two wins on the Gulfstream turf this year.
Battle of Blenheim, in the one hole, likely will set the pace. Zayas will ride for David Braddy.
Over the Channel, from post eight, should b gaining late. Vasquez will ride for David Fawkes.
*On Saturday, Tatweej beat Hard Lightning by 2 1/2 lengths in a one mile allowance ($47,000) on dirt.
Tatweej, a 4-year-old son of Tapit, won in 1:36.43 on the track listed as good. Zayas rode for Todd Pletcher.
Tatweej has raced three times, all at Gulfstream, with two wins and a third place finish.
Tatweej was bought for $2.5 million by Alshareef Hazzaa Shaker Alabdali at the 2017 Keeneland September Sale.