301 articles
Horseracing Integrity and Safety Authority
Horseracing Integrity and Safety Authority (HISA): private nonprofit self-regulatory body created by the 2020 Horseracing Integrity and Safety Act, overseen by the FTC, enforcing uniform Thoroughbred racetrack safety and anti-doping rules; distinct from state racing commissions and from HIWU, its ADMC enforcement agency.
Inari One (イナリワン)
Inari One (イナリワン) was a Japanese Thoroughbred racehorse, foaled in 1984, who rose from regional dirt racing to win three 1989 G1 races and be named Japanese Horse of the Year.
Indian Derby
Indian Derby: India's premier Grade 1 horse race, first run 30 January 1943, run over 2400 m at Mahalaxmi Racecourse, Mumbai, on the first Sunday of February; 2026 winner Fynbos.
Inter Dominion
Inter Dominion: Australasian harness racing championship series first held in 1936, rotating between Australian states and New Zealand, with heats and Grand Finals for pacers and trotters; Blacks A Fake won a record four finals.
Inter Dominion Trotting Championship
Inter Dominion Trotting Championship: trotters' division of the Australasian Inter Dominion harness racing series, first run 1948 at Alexandra Park, Auckland; recent champions Just Believe, The Locomotive, Arcee Phoenix.
Irish 2,000 Guineas
Irish 2,000 Guineas (Tattersalls Irish 2,000 Guineas): Group 1 flat race over one mile at the Curragh, Ireland, for three-year-old colts and fillies, run each May after the Newmarket 2,000 Guineas; Aidan O'Brien leads trainers with 8 wins since 1990.
Irish Champion Stakes
Irish Champion Stakes, also run as Joe McGrath Memorial Stakes, a Group 1 flat race over 2000m each September at Leopardstown, Dublin; headline race of the Irish Champions Festival and an Arc trial, first run 1976.
Irish Derby
Irish Derby (Dubai Duty Free Irish Derby): Ireland's oldest classic, a Group 1 for three-year-olds over 2,400 m at the Curragh, founded 1866, run four weeks after Epsom; 2026 winner Benvenuto Cellini.
Irish Grand National
Irish Grand National: 3m5f handicap steeplechase run on Easter Monday at Fairyhouse, Co Meath, first run 1870 (winner Sir Robert Peel). Records: Tom Dreaper 10 wins, Pat Taaffe 6, Brown Lad 3; Arkle 1964; Freewheelin Dylan 150-1 in 2021.
Iroquois Steeplechase
The Iroquois Steeplechase is an annual steeplechase horse race meeting held on the second Saturday in May at Percy Warner Park in Nashville, first run in 1941.
J. P. McManus
JP McManus (John Patrick McManus, born 1951, County Limerick), Irish billionaire gambler and racehorse owner, record 78 Cheltenham Festival wins, nine Champion Hurdles, three Grand Nationals, green and gold silks.
James Spencer-Churchill, 12th Duke of Marlborough
James Spencer-Churchill, 12th Duke of Marlborough, known as Jamie Blandford, is an English peer who inherited the title in 2014 and is a distant relative of Winston Churchill.
Japan Cup
Japan Cup (ジャパンカップ), Japan's premier G1 international invitational horse race, 2,400 m turf, weight for age, at Tokyo Racecourse each late November. First run 1981; 2023 IFHA world top-rated race; 2025 winner Calandagan in record 2:20.3.
Jockey
Jockey: licensed professional racehorse rider (flat or jump). Covers weight limits (50.8–64 kg GB), apprentice 7 lb claims, pay (fees, ~7% of win prize, retainers), injury rates, whip rules, and licensing across jurisdictions.
John Hunt (sports commentator)
John Hunt (born 1965) is the British lead horse racing commentator for BBC Radio 5 Live since 2004, a former Metropolitan Police officer, Racing Broadcaster of the Year 2015; distinct from the Australian race-caller John Hunt.
John Magnier
John Magnier (born 1948), Irish bloodstock breeder known as 'The Boss', head of Coolmore Stud in Tipperary; with Vincent O'Brien and Robert Sangster he industrialized stallion marketing, standing Sadler's Wells and Galileo.
John McCririck
John McCririck (1940–2019), known as 'Big Mac', was an English horse racing journalist and broadcaster, the deerstalker-hatted betting-ring reporter for ITV and Channel 4 Racing, who won journalism awards at the Sporting Life, appeared on Celebrity Big Brother, and lost a 2013 age discrimination case against Channel 4.
Jungle Pocket (ジャングルポケット)
Jungle Pocket (ジャングルポケット), 1998-2021, Japanese racehorse and sire by Tony Bin; won the 2001 Japanese Derby and Japan Cup, 2001 JRA Horse of the Year; sired Tosen Jordan and Jaguar Mail.
Juryoku Pierrot (ジュリョクピエロ)
Juryoku Pierrot (ジュウリョクピエロ) is a Japanese chestnut Thoroughbred filly by Orfevre, foaled 2023, trained by Ryo Terashima, who won the 2026 Japanese Oaks (Yushun Himba) under Seina Imamura, the first Japanese female jockey to win a JRA Grade 1.
Just A Way (ジャスタウェイ)
Just A Way (ジャスタウェイ), Japanese Thoroughbred foaled 2009 by Heart's Cry; rated 130 as 2014 Longines World's Best Racehorse after winning the Dubai Duty Free by 6¼ lengths; also won Tenno Sho (Autumn) and Yasuda Kinen; now a Shadai stallion.
Justify (horse)
Justify (foaled 2015) is an American Thoroughbred who won the 2018 Triple Crown, the 13th winner, going 6-for-6 undefeated for Bob Baffert and Mike Smith, then retired to Ashford Stud.
Ka Ying Rising
Ka Ying Rising (嘉應高昇), NZ-bred 2020 gelding by Shamexpress trained by David Hayes in Hong Kong, record 22 wins from 24 starts, two Hong Kong Sprints, The Everest 2025, and a Hong Kong-record 18+ consecutive wins.
Katsuragi Ace (カツラギエース)
Katsuragi Ace (カツラギエース), 1980–2000, Japanese dark bay racehorse and sire by Boysie Boy; won the 1984 Japan Cup (G1) and Takarazuka Kinen, first Japanese-trained Japan Cup winner, 22 starts 10 wins.
Kentucky Derby
Kentucky Derby, the "Run for the Roses": Grade I stakes for three-year-old Thoroughbreds at 1 1/4 miles, first Saturday in May at Churchill Downs, Louisville. Run since 1875; first winner Aristides; first jewel of the Triple Crown.
Kentucky Oaks
Kentucky Oaks (Longines Kentucky Oaks), Grade I 1 1/8-mile race for 3-year-old fillies at Churchill Downs, first run May 19, 1875, day before the Derby; $1.5 million purse, Road to the Oaks points system, lilies garland, pink Oaks Day, primetime NBC since 2026.
Kieren Fallon
Kieren Fallon, Irish flat racing jockey (born 1965, Crusheen, Co Clare), six-time British champion jockey, three Epsom Derby wins (Oath, Kris Kin, North Light), 16 British Classics, later dogged by race-fixing trial and drugs bans; retired 2016.
Kincsem
Kincsem (1874–1887), Hungarian Thoroughbred mare by Cambuscan out of Waternymph, unbeaten in all 54 starts 1876–79 for owner-breeder Ernő Blaskovich; trained by Robert Hesp, won Goodwood Cup and three Grosser Preis von Baden; not the Kincsem Park track itself.
King George VI and Queen Elizabeth Stakes
The King George VI and Queen Elizabeth Stakes is a Group 1 horse race run over a mile and four furlongs at Ascot in July, first run in 1951.
King George VI Chase
King George VI Chase, a Grade 1 three-mile steeplechase at Kempton Park run on Boxing Day since 1937; Kauto Star won it a record five times, Desert Orchid four; second leg of jumps Triple Crown before the Cheltenham Gold Cup.
King Kamehameha (キングカメハメハ) (horse)
King Kamehameha (キングカメハメハ), Japanese Thoroughbred (2001–2019) by Kingmambo; won the 2004 Japanese Derby in record time, then champion sire 2010–2011, sire of Lord Kanaloa and Duramente, JRA Hall of Fame 2024.