actual jockey

[njcurveball]

Is this new, old, or just something I never noticed?

Let's use the 8th race at Mountaineer on August 12 as an example.

#8 Haunted River is scheduled to be ridden by Randy Wilson. Late Jockey change to Dana Whitney.

In previous threads the merits of keeping the original jockey rating have been discussed. I am in the minority in wanting this rating changed to reflect the new jockey. That is fine, majority rules here.

But when I export the race, the jockey is still Randy Wilson. Has this always been the case? When I print out my track profile, I need to know the actual winning jockey. Am I also in the minority here?

It certainly can add a lot of work at the end of my day to keep track of all the jockey changes when they aren't reflected in the export.

Any help is appreciated.

thanks,
Jim

[tbrown]

I never noticed this - I just assumed it was changed if you downloaded the results/charts.
You can link the comma charts to get what you need now.

[km]

The originally named rider stats are hard-coded into our files. There is no way for me or HDW to reach into the Equibase main computer at the moment of a jockey switch and give us the new stats for the replacement. Whatever is in there, we are stuck with it - including the export and robot.

We do get the name of the new rider eventually such as our pps, charts, and the new com-chart file, (and the late change is noted in the PPX) but there is no way to update the orginal statistics pulled for the first-named rider.

So the JKY and TJ ratings remain static from the creation of the file. HDW cannot update our files after every change, that would create chaos in the file library.

In a future update, i'll create a data field in HX4 to notate that fact that there was a late rider switch - so the user can exclude these horses (or test separately as i did, see below). This will require the future PPX db file. If you look at the jockey listing in the PPX now, a "<" indicates the name was a late switch from the original.

My own tests show no signficant change in long term impact value and ROI with the (K) stats and other factors when late jock changes occur. I ran these tests by comparing the Jky name in HX4 field 104 tLJKY (actual rider last start) with the name of the assigned rider from the exported data for that date in the horse's previous start. Y

HTR users can do the same with a little creativity and look for non-matches for this item and test it yourself. Possibly even using field 104 to find positive and negative late jockey situations or shenanigans that occur when one rider is named on two horses in the same race by a trainer, etc.

[njcurveball]

Ken,

Are you saying that horses can be scratched, post positions can be changed, distances, surfaces, etc. Yet the name of the rider cannot?

I can assure you that in my tests at Mountaineer, a late rider switch to Dana Whitney DEFINITELY increases the profitability of a horse.

Perhaps this evens out over many tracks. But I still do not see why the export cannot have the name of the ACTUAL jockey.

thanks,
Jim

[km]

Prior to the com-charts i didn't have way to extract the name of the actual rider for the export. But as i said, our statistics for the assigned jockey are hard coded into the file, so changing the NAME of a rider would not change the TRN and TJ ratings even if you had the replacement's name or typed it in manually.

The Scratch situation changes internal velocity calculations and post-position order simply by removing horses from the mix and re-computing. Those are HTR calculations. The jockey information comes from direct from HDW and Equibase. We cannot store the names and statistics required for every possible replacement rider in our racefiles.

The logistics of this are no different for us than any other service. If you buy a Racing Form, download a BRIS file, or buy stats from any source, there is no facility for changing the jockey name and statistics if there is a late switch except using the pen.

Exporting the NAME of the actual rider can be done now with the com-charts. Comparing the name of the actual with the assigned would denote a change. I can also do this with the PPX and will add that to HX4 in the future, but that will only denote past race changes, not the current race. Currently, there is nothing i can do short of having you type in the replacement name every time.

[njcurveball]

I understand your explanation Ken. Thanks for taking the time to put in the details.

Your help is greatly appreciated.

Jim