What Is an Apprentice Jockey? The 'Bug,' Weight Allowances and a Teen's Keeneland Debut

What is an apprentice jockey?

An apprentice jockey is a newly licensed race rider who is allowed to ride at a lighter weight than everyone else, usually 10 pounds lighter at the start. That weight break, called the apprentice allowance, shrinks as the rider wins races and then disappears, at which point the rider becomes a full-fledged "journeyman" jockey.

The idea is simple. A beginner is less polished than a veteran, so racing gives the horse a few pounds' head start to make hiring the beginner worthwhile.

That is exactly the situation fans watched at Keeneland this week.

The hook: a 17-year-old's debut at Keeneland

On Wednesday, Oct. 14, 2026, 17-year-old Puerto Rican apprentice Yomar Ortiz Jr. rode his first race at Keeneland. According to Keeneland's race report, he rallied from last to finish second aboard Eli's Promise for trainer Joe Sharp in the third race, a 6-furlong claiming race on the main track. Lucky Shot won.

Keeneland also listed him on two more Sharp-trained mounts for Thursday, Oct. 15: Motivated by Grace in the second race and Salty Viking in the fifth.

A few professional details, as reported by Thoroughbred Daily News in 2025 and the Spanish-language racing site Meridiano:

• He learned to ride through U.S. Pony Racing in Maryland and was riding pony races on his own by age 12.
• The winter before he turned 16, he spent about two months at Puerto Rico's Escuela Vocacional Hípica, at Camarero racetrack, the same school his father attended.
• Back in the United States, he got his exercise rider's license and galloped horses in the mornings for trainers in Maryland.
• He carried a 10-pound (about 4.5 kg) apprentice allowance in his debut.
• He is not related to the Ortiz brothers, Irad Jr. and José Luis, who are already established stars.

One race is one race. What makes his debut useful for the rest of us is that it shows the whole apprentice system working in real time. If claiming races are new to you, start with our claiming race explainer.

What is a bug jockey? The asterisk explained

In American racing slang, an apprentice is a "bug" and a young apprentice is often called a "bug boy" or "bug girl." Keeneland's racing glossary explains that the nickname comes from the asterisk printed in the program to show that the rider is claiming a weight allowance. In other words, the little star in the program is the "bug."

Here is how to read it:

• An asterisk by the rider's name or the horse's weight means the apprentice allowance is being claimed.
• Formats vary by track and publisher, so check the program's key to see how the size of the allowance is shown.
• "Losing the bug" means the allowance has run out and the rider now competes on equal terms.

How apprentice jockey weight allowances work

Every horse in a race is assigned a weight, which covers the jockey plus the saddle and gear. If a horse is assigned 122 pounds and a 10-pound apprentice rides, the horse carries 112.

Kentucky's rule, step by step

Kentucky's apprentice rules are in its racing regulations, 810 KAR 4:070. Today they are enforced by the Kentucky Horse Racing and Gaming Corporation, which took over the duties of the Kentucky Horse Racing Commission (KHRC) in 2024. For Thoroughbreds, a rider who is at least 16 and has never been licensed as a jockey anywhere can claim:

The fine print matters:

• Slow track: If the rider hasn't reached 40 wins one year after the fifth win, the current allowance continues for one more year or until win 40, whichever comes first.
• Hard cap: The allowance generally can't run longer than two years from the fifth win.
• Extensions: If an apprentice can't ride for seven or more days in a row because of injury, military service, school or another valid reason, the allowance can be extended by up to the time missed, on the stewards' recommendation.
• Not in every race: The rule applies in purse races except handicaps. Keeneland's glossary notes apprentices get no allowance in stakes races.
• Who qualifies: Apprentices must be at least 16, licensed under their legal name and have served at least a year with a racing stable. Stewards can also ask for a medical affidavit.

Other states and countries

The 10-7-5 pattern is common across North America, but details differ by jurisdiction. These include exactly when the allowance can be claimed, how long it lasts and whether it applies in certain races. Other racing countries use their own systems, often allowing "claims" that shrink with wins. Always check the local rule book before assuming.

Why trainers ride a 'bug'

Ten pounds sounds small next to a 1,000-pound horse. Over a race, though, carrying less weight can help, especially in sprints and in races where horses are closely matched. That is why some trainers seek out a good apprentice.

Other reasons trainers use bugs:

• Effort and availability. Apprentices are hungry for mounts, show up for morning workouts and get to know the horses.
• Development. A trainer who believes in a young rider can help build a career with steady mounts. Joe Sharp named Ortiz on his debut mount and on two more horses for the next day.
• Fit for the race. Allowances matter most in everyday races, such as claimers and allowance races, which is exactly where apprentices usually start.

The tradeoff is experience. A bug rider may break slowly or get stuck in traffic, which is why the allowance exists in the first place.

How to become a jockey: schools and pony racing

There is no single road, but most jockeys combine riding skill, stable work and a licensing process. Here is the typical path in the U.S.:

1. Learn to ride well, often starting as a kid with ponies. See our guide to what age kids can start riding.
2. Work on the backstretch as a hotwalker, groom or exercise rider. Kentucky requires a year with a racing stable before an apprentice license.
3. Gallop horses in the mornings until trainers trust you at speed.
4. Get licensed through the state's stewards. You must be at least 16 in Kentucky.
5. Ride your first races as an apprentice, then work to lose the bug.

Inside Puerto Rico's jockey school

Puerto Rico's Escuela Vocacional Hípica Agustín Mercado Reverón in Canóvanas, at Camarero, is one of the best-known jockey schools in the Americas. Its graduates include Irad Ortiz Jr. and José Luis Ortiz. According to a 2026 Primera Hora report:

• It is run under the island's Gaming Commission and its horse racing bureau. It also trains exercise riders, farriers, trainers and grooms.
• Applications open each September. Candidates take an interview and then a physical test, and classes start in January.
• Jockey applicants must be at least 16, have finished at least 9th grade and weigh 102 pounds or less. There is no height limit.
• The jockey program runs two years, weekdays from 6 a.m. to noon. It covers riding, physical education, conversational English, racing theory and professional ethics.
• Second-year students ride practice races, and graduates receive a professional jockey license.

Why pony racing counts

Pony racing teaches young riders to break from a start, hold a line and finish, all on a smaller, more manageable animal. In Britain, the Pony Racing Authority calls it a recognized grassroots route into racing. It is one of the main entry points to a Rider Development Pathway launched in January 2026. Maryland's pony races played a similar role for Ortiz.

What to watch next

• His next rides. Ortiz is named on Motivated by Grace and Salty Viking on Thursday's Keeneland card. Check official results rather than social media for how they went.
• The win count. At five wins, a Kentucky apprentice drops from 10 to 7 pounds. Watch for the asterisks to change in the program.
• Read the program yourself. Next time you are at the track, find the bug riders. Our Keeneland fall meet guide covers visiting with family.
• Learn the language. New to terms like "journeyman," "claimer" or "furlong"? Our glossary has them.

If you have a young rider dreaming of the track, start with safe riding basics on our safety page. And for how the horses learn their side of the job, read about two-year-old racehorses.