O'Sullevan was involved, in the late 1940s, in some of the earliest television commentaries on any sport, and made many radio commentaries in his earlier years (including the
Grand National before it was televised for the first time in 1960). On television, he commentated on many of the major events of the racing year, including the
Cheltenham Festival until 1994,
The Derby until 1979, and the
Grand National,
Royal Ascot and
Glorious Goodwood until he retired in 1997. During his career, he commentated on around 30 runnings of the
Prix de l'Arc de Triomphe in Paris and racing from the United States and Ireland as well as trotting from Rome during the 1960s. During his 50 years of commentating on the Grand National, O'Sullevan commentated on numerous historic victories. These included
Bob Champion's run on
Aldaniti in
1981 after recovering from cancer, 100/1 outsider
Foinavon's win in
1967, and the three-times winner
Red Rum in
1973,
1974 and
1977. He also commentated on the
1993 Grand National, which was declared void after 30 of the 39 runners failed to realise there had been a false start, and seven went on to complete the course. As the runners approached the second-last fence in the so-called "race that never was", O'Sullevan declared it "the greatest disaster in the history of the Grand National." O'Sullevan became known as the "Voice of Racing". In a television interview before his 50th and last Grand National in
1997, he revealed that his commentary binoculars came from a German submarine. He was knighted the same year – the only sports broadcaster at that time to have been bestowed that honour. O'Sullevan was also a racehorse owner, including of Be Friendly, who won the
King's Stand Stakes at Ascot, and
Prix de l'Abbaye de Longchamp. He was twice successful in the
Haydock Sprint Cup (then Vernons Sprint) in 1966 and 1967. Another horse he owned was Attivo, whose victory in the 1974
Triumph Hurdle at the
Cheltenham Festival was described by O'Sullevan as the most difficult race to call. After passing the line, O'Sullevan uttered: "And it's first Attivo, owned by, uh, Peter O'Sullevan... trained by Cyril Mitchell and ridden by Robert Hughes." Attivo also won the
Chester Cup and the
Northumberland Plate during the 1970s. O'Sullevan's final race commentary came at
Newbury for the 1997
Hennessy Gold Cup, and he visited the winners' enclosure as a winning owner in the race which followed courtesy of Sounds Fyne's victory in the Fulke Walwyn Chase. He was succeeded as the BBC's lead commentator by
Jim McGrath. After his retirement, O'Sullevan was actively involved in charity work fundraising for causes which revolve around the protection of horses and farm animals, including the International League for the Protection of Horses (ILPH), the Thoroughbred Rehabilitation Centre and
Compassion in World Farming. The National Hunt Challenge Chase Cup (run at the Cheltenham Festival) was named after him in 2008 to celebrate his 90th birthday. In 2010,
Aintree Racecourse named O'Sullevan as one of the eight inaugural "Grand National Legends". His name is inscribed on a commemorative plaque at the course, alongside the likes of
Ginger McCain and Captain
Martin Becher. ==Personal life==