Delafield was educated at Cambridge University where he studied Law. He rowed for Cambridge in The Boat Race in the 1966, 1967 and 1968 races. In 1968 with Delafield as President, Cambridge started a streak of six consecutive wins. In 1970 Delafield was runner up in the Diamond Challenge Sculls at Henley Royal Regatta. In 1972 he partnered Tim Crooks to win the Double Sculls Challenge Cup at Henley. Delafield and Crooks competed for Great Britain at the 1972 Summer Olympics in the double sculls and came fifth overall.
Delafield spent many years in the beverage business in Western and Eastern Europe with Guinness and Stroh Brewery Company of Detroit. He lived in Jersey for 25 years and headed up G. Orange & Co., Beverage Merchants in Jersey from 1997 to 2004 and became director of business development with Victor Hugo Wines in 2005. He was a director of Noventa until his resignation in 2009. Delafield was President of Leander Club from 2003 to 2008.
- "1946–1975". The Boat Race. Retrieved 7 May 2011.
- Henley Royal Regatta Results of Final Races 1946-2003
- Sport Reference Olympic Athletes - Patrick Delafield
- RNS Number : 4311V Noventa Limited 9 July 2009
- "Leander Club Newsletter" (PDF). Summer 2003. Retrieved 7 May 2011.
- "Leander Club Newsletter" (PDF). Summer 2008. Retrieved 7 May 2011.