Statistics
Not So Classic
Byron Rogers in Thursday’s TDN (PDF):
Without milkshakes and steroids the horses that have been selected for and trained as “classic types” by bloodstock agents, owners and trainers are now exposed for the sprinters that they genetically are.
I speculated about something similar in 2013, after Oxbow won the Preakness Stakes in a slow time and Bill Oppenheim brought up the trend of declining Beyer speed figures in the spring classics. Commenting on the Belmont Stakes figure collapse that began with Da’Tara in 2008, I wrote:
[T]he data suggest that there may be additional factors at work, such as changing training practices and the elimination of routine steroid use.
Rogers reports data, in the form of a genetic study done by his pedigree consulting practice on 1500+ horses, that found “the North American breeding population has the second highest percentage of horses that have been genetically selected for sprinting,” and concludes that there’s no reversing that trend, which began decades ago, without “significant structural changes.” If that happened, in his view, the game likely wouldn’t see a renewed emphasis on breeding for distance expressed in speed figures for at least 15-20 years. That’s probably more time than interests the market.
For a sense of how much things have changed (beyond the classic races), consider these statistics tweeted by @o_crunk last fall (via Sid Fernando):
Percentage of US races longer than 1M on dirt and synth:
1991 – 19.91%
1996 – 16.78%
2001 – 15.57%
2006 – 14.31%
2011 – 13.46%
Percentage of US races on dirt and synth at 6F or less:
1991 – 54.24%
1996 – 51.30%
2001 – 50.31%
2006 – 50.58%
2011 – 49.71%
Percentage of US dirt and synth races at less than 6F:
1991 – 13.27%
1996 – 15.15%
2001 – 17.92%
2006 – 21.60%
2011 – 23.25%
So, shortening the Kentucky Derby to nine furlongs from 10, and the Belmont Stakes to 10 furlongs from 12, as Oppenheim suggests in his most recent column (PDF), would more closely align the classic races with the realities of contemporary American racing and breeding. Whether that’s a worthy goal or not, I’ll leave to breeders and pedigree experts to debate.
The Rule
The one Kentucky Derby rule still going strong is that the Derby winner raced as a 2-year-old. It’s been so every year since 1882. I took a quick look at that record last year, when Verrazano was the unraced-as-a-2YO Derby contender, noting that since 2003, only nine of 192 Derby starters hadn’t raced as a juvenile (that’s now 10 of 211). It’s a small group. Nicole Sauer dives deeper into the numbers, looking at all graded stakes starters from 1973-2013:
During this period, 73% of graded stakes starters raced at age 2, while 27% were unraced as 2-year-olds. If “having a 2-year-old foundation” is important for graded stakes performance at 3, then we should expect a higher proportion of 3-year-old graded stakes winners to have raced at 2. This is the case, but only by a 2.2% margin: 75% of 3-year-old graded stakes winners raced at 2 compared to 25% who didn’t.
So, there’s a slight edge to having juvenile experience. A very slight edge.
Hoppertunity is the sole likely Kentucky Derby starter this year who didn’t race last year. If you like him, though, you have to like that he’s made up for that lack of early experience with five starts so far this year.
Wise Dan’s Return
The Horse of the Year is set to make his first start of 2014 today, and:
“If he is going to be vulnerable, this is it because the others that are in there have been running,” [trainer Charlie] LoPresti said.
True, but he’s also a returning champion. The odds are good that he’ll win. In 2010, I found that returning champions beat the winning favorites average by a significant margin when they made their first starts of a new season.
The stats for returning champions are now updated through 2012: You can view the numbers and complete spreadsheet via Raceday 360. There are a couple of changes in this year’s version: I restricted the data to only starts made in North American races with wagering (horses who returned in non-wagering exhibition races and foreign races were excluded, as were steeplechase champions). I also broke out the numbers by division and decade this year, as well as by class, which revealed a few interesting tidbits.
One thing I left out of the R360 post, but wanted to make note of, is that all champions, not only the favored, won or finished in the money in 186 out of 228 races (or 82% of starts). Be sure to include them in your exotics.
The original data, including all champions named from 1971-2012, and not only those who returned to race, can be downloaded as an Excel file.
4/12/14 Update: And Wise Dan wins the Maker’s 46 Mile by three-quarters of a length over Kaigun. Here’s the returning Horse of the Year chart, updated:
That brings the returning HOTY record to 18 wins from 23 starts (18 wins from 22 favored), for a total payout of $49.10 on $46 bet.
Breeders’ Cup Favorites
From Jeff Scott’s Breeders’ Cup tidbits:
Favorites won 32 percent (38-120) of races in the sample, a figure comparable to the record of racing favorites in general. The fact that BC fields are considerably larger than average may make the 32 percent strike rate higher than expected.
Favorites have had mixed success finishing in the money in the recent years. In 2012, favorites finished in the top three in five of six races on Friday, six of nine on Saturday. In 2011, three of six on Friday, four of nine on Saturday. In 2010, four of six on Friday, four of eight on Saturday.
10/26/13 Addendum: Breeders’ Cup contenders, by the numbers. “There are 121 group or graded stakes winners in the entries, including 71 winners of Group 1 or Grade 1 races.” And 74 of the 172 pre-entries won their last starts.
About
Jessica Chapel writes and edits in Massachusetts. Railbird is a Thoroughbred horse racing blog published from June 2004 to July 2019. More / Contact
Elsewhere
Find Jessica on Pinboard and Instagram, Railbird on LibraryThing and Twitter.
Etc.
Links
Search
Boston Racing
Spreadsheets/Data
← Home
Copyright © 2000-2023 by Jessica Chapel. All rights reserved.