My Swallow set a record for prize money won by a two-year-old in Europe and was rated the best of an exceptional crop of European juveniles.
[3] As a yearling, My Swallow was sent to the sales in Dublin where he was bought for 5,000 guineas by Lord Harrington acting on behalf of the businessman and philanthropist David Robinson.
He began his French campaign in late June when he won the Prix du Bois over 1000 metres at Longchamp Racecourse by four length from Primaticcio.
In July at Maisons-Laffitte Racecourse he contested the Prix Robert Papin over 1100m in which he was matched against the American-bred, British-trained colt Mill Reef, who had won the Coventry Stakes at Royal Ascot by eight lengths.
The two British challengers drew clear of the field in the closing stages, with My Swallow (ridden by Lester Piggott), prevailing by a short head after a "magnificent duel".
[6] He claimed his seventh consecutive race by winning from Bonami and Marche Persan, and ended the year as the top-rated two-year-old in Britain and France.
[7] My Swallow's three-year-old season began with a win against moderate opposition in the Usher Stakes over seven furlongs at Kempton Park Racecourse in April.
[9] In June, My Swallow returned to France and was matched against older horses in the Group Three Prix de la Porte Maillot over 1400m at Longchamp.
[3] In the Free Handicap, a rating of the season's best two-year-olds to have raced in Britain, My Swallow was given the top weight of 133 pounds, ahead of Mill Reef (132), Brigadier Gerard (131) and the filly Cawston's Pride (130).
[12] At the end of his racing career, My Swallow was sold for £400,000 to Irving Allen and became a breeding stallion at the Derisley Wood stud in Newmarket.