Handicapping Feature
HANDICAPPING FEATURES
MARCH 14, 2007
Hidden dangers in common trainer stats
by Steve Zacks
Last time, I discussed points of entry using trainer
statistics.
Here are three examples to make the point, this can happen if
you use statistics in an unknowing or uncaring way and without understanding
exactly the full implications of them. Hidden dangers may lurk beneath the
surface, so caveat emptor: let the buyer beware. What you see may
NOT be what you get!
In one form or another, many of us have fallen prey to similar
misuse of information. The specifics do not matter; similar examples permeate
racing publications regularly. Regardless of the work involved, if you are using
your own home-made information you know exactly what data is in there and
exactly what it means.
Example One
A four-year-old gelding makes his initial career start going
nine furlongs on the turf in a maiden special weight for three-year-olds and up at an "A"
track.
Trainer stats:
| This year: | 22 percent winners from 476 starters -ROI | |
| 1ST-time starters: | 23 percent winners from 90 starters +ROI | |
| Maiden Special Weight: | 27 percent winners from 152 starters +ROI | |
| 1ST-time route: | 25 percent winners from 80 starters $= | |
| 1ST-time turf: | 24 percent winners from 100 starters -ROI |
Additional Information: Horse has a series of
moderate works from four to six furlongs dating back some 90 days, and spaced
every six-to-10 days with no extended gaps. The BRIS pedigree information in
the BRIS Ultimate Past Performances suggests that the horse is bred to run long,
and could perform well on the turf.
Comments: This horse is in the care of a solid
trainer, who wins 20 percent or more of his starts, but has a public following
and is usually well bet. We also know that in the right
circumstances the trainer is capable of preparing the horse to do what
is being asked of him today. Because he is a first-time starter, we really have
no true indicator of what the horse can do.
Workouts may give some indication of
his inherent ability, but until tested under fire, no one knows for sure how the
horse will perform, and of course there are all of the vagaries of what can
happen in the race itself. The horse has the pedigree and preparation to do what
is asked of him.
The devil may be in the details
Experience teaches that one should be careful about what he
reads and how he uses the same. Quality information is usually more difficult to
get.
This type of "good" information may be gleaned by clipping the past
performances of winners, recording information about certain winners or trainers
in a notebook or a database; even if only the multiple characteristics of
winners are collected, one becomes aware of nuances, which go beyond the raw
data of the simple statistics.
It may be hard work, but it does pay dividends in
two respects: it will keep you off misleading-looking low-priced losers who are
not as promising as the first glance suggests, and it may turn you on to some
hidden trainer techniques or go signals which have higher wager value, even if
they occur infrequently.
Part of what we know
comes from a collection of data race by race over a period of time. Here is some
additional information that is not evident on the surface, but is of the utmost
importance:
The trainer has never won with a first-time starter going
long on the turf.
Of the 20 first-time starters who won, 14 of them were
two-year-olds, 18 of them won sprints.
17 of the 20 first-time route winners had at least
two previous races, usually sprints, and three had only one prior start.
All of the first-time turf winners had three or more
starts, and at least half of them had raced at today's distance or
longer.
Will this horse win today? He might.
One thing is for sure,
the trainer's published statistics will lead to the horse being over bet
considering his true chances of winning. The likelihood, however, is that
unless this is an exceptional runner, the trainer is prepping this horse for a
later start – something not necessarily in evidence from the statistics – if read
without a critical eye.
Example Two
Three-year-old male debuts in maiden special weight at six furlongs
on the dirt, early in the year at an "A" track.
Trainer stats:
| This year: | 20 percent winners from 140 starters -ROI
| |
| 1ST-time starters: | 20 percent winners from 60 starters -ROI | |
| Maiden Special Weight:
| 25 percent winners from 40 starters -ROI |
Additional Form Information: This horse shows a
series of better than average works, fairly regularly spaced with no gaps.
Pedigree information shows that the sire is a top debut sire (above 18 percent) and the
stakes-winning dam has produced several debut winners.
Comments: The trainer debut win percent, in
conjunction with a strong work pattern, which includes several above average
works, suggest that this horse – from a top stable and with a top rider up - is
likely to go off at a short price. While the information base tracked only
winners, and not those starters that lost, there was a hidden key element
missing from the past performance profile. The ROI (Return on Investment) was
modestly negative on this trainer in this debut category, but there was one
element that if added to the mix, would turn it strongly into the black. Without
its presence, one might be deterred from betting on this horse at low odds. Eight of the
10 maiden special weight winners at six furlongs or longer, and one of the two
maiden claiming winners, had shown a six-furlong gate work in the 21 days before
the winning debut.
This colt has never worked six furlongs.
He still could win. But if you had the additional information
about the six furlong gate work would you be betting on this horse at 2-1 or
less? At 15-1 maybe you would take a chance.
Example Three
Proven five-year-gelding makes his first start for a new trainer
after shipping to a new circuit, going a two-turn mile in a high-dollar claimer.
Trainer stats:
| This year: | 22 percent winners from 99 starters $= | |
| 1ST-time with trainer:
| 25 percent winners from 80
starters +ROI | |
| Shippers: | 18 percent winners from 50 starters $= | |
| Layoffs 91+ days: | .08 percent winners from 72 starters -ROI |
Additional Form Information: Horse has won several
races at today's track, at today's distance and off similar layoffs. He has also
won following a claim and track switch in the past. This information was
available from either the current past performances or those found on old forms
saved in hard copy, or on a hard drive, or from past clippings of other wins.
Comments: The trainer stats here provide somewhat
conflicting information. The trainer is obviously competent as several of the
win percents show.
The question is how to handle the somewhat conflicting
negative statistic for the long layoff, which is below his normal performance
level – either a weakness or perhaps trainer intent.
Very often the listed
statistics will conflict; very often there is additional information which will
provide important clues, but is not there to look at. It is clear that the
trainer can get a horse ready to run off a long layoff if he so chooses and
if the horse will do so as the half-dozen or so past winners
demonstrate. Knowing how the trainer generally prepares his horses will
frequently provide some clues. Many trainers use certain work distances or
patterns to prepare post-vacation runners for an immediate top effort. Maybe
the key relates to the choice of rider (this might show up in the BRIS Ultimate
Past Performances), the class maneuver or quite possibly the horse himself.
This horse has already indicated an ability to win off a long layoff in the
past. If the work tab and class placement suggest that the trainer is interested
today, then he is a lot more interesting than if there is one three-furlong
breeze in :39, 17 days ago.
Tentative Conclusions
Just as with most elements of
horse race betting, little is simple and straightforward. Keeping additional
trainer data, might give one special insights into simple statistics. Some
things work better together than they do alone.
The basic premise was that: if a "good" trainer did
something more than once, and with more than one horse, that was in his bag of
tricks and he was eligible to use it at anytime in the future.
Good trainers know that each runner is different, but also that they tend to
fall into general types: slow down naturally quick horses in the morning, ask
slower horses to work faster; some gallop fast and get their wind in shape and
need little work; others have unsound underpinnings and may be unable to stand
up to strenuous morning exercise, and so on. If he had past success with
blinkers or a tongue tie, or a figure eight, or a certain jockey because he does
something different during the race or has soft hands, then he tends to go back
to them when he thinks the scenario might fit.
Never underestimate the potential of a pattern
match between horse and trainer. If a horse moves to a new trainer who has
success with layoff returnees, in addition to moving from a trainer who did not either
try or have the ability to do so and the horse has run well fresh in the past -- look out!
One thought on using information about winners only, which
means one does not know the percentages: While it certainly is more useful to
know how often each maneuver is tried, how often it succeeded, as well as the
odds and dollar return, simpler forms of information can provide subsets that
keep a player off low-odds losers, justify low-odds plays on others, and produce
very generous payouts on still others.
The ideal situation would be interactive trainer stats,
which would allow the handicapper to track multiple qualifying factors at the
same time -- first-time starter, first time on turf, first time going long --
and understanding all the specifics of each particular situation. Until that
format becomes available, any extra tidbits of information can and do go a long
way to keeping you in the black.
Authors
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