Question: In what year did the most successful European Ryder Cup captain ever win the U.S. Open?

Context paragraphs:
AGF Open: The AGF Open was a European Tour golf tournament which was played in France from 1988 to 1990.  The first event was held at Biarritz Golf Club and the other two at Golf de La Grande-Motte, near Montpellier.  The most notable of the three winners was future European Ryder Cup captain Mark James of England.  In 1990 the prize fund was £201,358, which was one of the smaller purses on the European Tour that year.

Worcester Country Club: Worcester Country Club is a private country club and golf course in Worcester, Massachusetts.  The course hosted the first Ryder Cup in 1927, and was the site of the 1925 U.S. Open, which was won by Willie Macfarlane.  It was the first, and currently only one of two golf courses in the United States to host all three events: the men's and women's U.S. Open Championships and the Ryder Cup.

Wales Open: The Wales Open was a professional golf tournament on the European Tour.  It was founded in 2000 and played annually through 2014.  The event was hosted at the Celtic Manor Resort in the city of Newport, South Wales, also the venue for the 2010 Ryder Cup.  The tournament was originally played over the resort's Wentwood Hills course, through 2004.  While that course was being redeveloped for the Ryder Cup, the Wales Open was played for three years (2005–07) on the Roman Road course, a par-69 venue.  Since 2008, the event has been played on the Ryder Cup Twenty-Ten course.  The tournament has previously been known as the Saab Wales Open and the Celtic Manor Wales Open due to past sponsorship deals.

Thomas Bjørn: Thomas Bjørn (born 18 February 1971) is a professional golfer from Denmark who plays on the European Tour.  He is the most successful Danish golfer to have played the game having won fifteen tournaments worldwide on the European Tour.  In 1997 he also became the first Dane to qualify for a European Ryder Cup team.  Bjørn is remembered for his collapse at Royal St. George's during the 2003 Open Championship, when he led by two strokes with three holes to play, but took three attempts to get out of a greenside bunker on the par three 16th, handing the tournament to Ben Curtis.  On 6 December 2016 he was announced as the European captain for the 2018 Ryder Cup.

Sam Torrance: Samuel Robert Torrance OBE (born 24 August 1953) is a Scottish professional golfer and sports commentator.  He was one of the leading players on the European Tour from the mid-1970s to the late 1990s, with 21 Tour wins.  Torrance was a member of European Ryder Cup teams on eight occasions, from 1981 to 1995 consecutively; he was on Cup-winning teams in 1985, 1987, 1989, and 1995.  He was the winning non-playing captain of the European Ryder Cup team in 2002.  Torrance was honoured with the MBE (1996) and OBE (2003), for his outstanding contributions to golf.

Seve Ballesteros: Severiano "Seve" Ballesteros Sota (] 9 April 1957 – 7 May 2011) was a Spanish professional golfer, a World No. 1 who was one of the sport's leading figures from the mid-1970s to the mid-1990s.  A member of a gifted golfing family, he won more than 90 international tournaments in his career, including five major championships between 1979 and 1988: The Open Championship three times, and the Masters Tournament twice.  He gained attention in the golfing world in 1976, when at the age of 19 he finished second at The Open.  He played a leading role in the re-emergence of European golf, helping the European Ryder Cup team to five wins both as a player and captain.  He won the World Match Play Championship a record-tying five times.  He is generally regarded as the greatest Continental European golfer of all time.

Paul McGinley: Paul Noel McGinley (born 16 December 1966) is an Irish professional golfer who has won four events on the European Tour.  At the 2002 Ryder Cup, he famously holed a ten-foot putt on the 18th hole in his match against Jim Furyk at The Belfry which won the Ryder Cup for Europe.  He was the winning captain of Europe in the 2014 Ryder Cup and the first Irishman to captain Europe's Ryder Cup side.

2010 U.S. Open (golf): The 2010 United States Open Championship was the 110th U.S. Open, held June 17–20 in Pebble Beach, California.  Graeme McDowell of Northern Ireland won his first major title, one stroke ahead of runner-up Grégory Havret of France.  McDowell was the first European to win the U.S. Open in forty years, since Tony Jacklin of England won in 1970, which started a period in which four out of five U.S. Open champions between 2010-14 were European.  This was the fifth U.S. Open to be played at Pebble Beach Golf Links (it also hosted in 2000, 1992, 1982, and 1972).

Junior Ryder Cup: The Junior Ryder Cup is a team golf competition between Europe and the United States.  It is based on the men's Ryder Cup and is run by the same organisations, the PGA of America and Ryder Cup Europe (a subsidiary of the PGA European Tour, with minority stakes held by the PGA of Great Britain & Ireland and the PGA of Europe).  The 2016 event took place at the Interlachen Country Club, Edina, Minnesota on September 26 and 27.  The United States won 15½–8½, their fifth successive victory in the event.  On recent occasions there has been an informal "friendship match" played on the Ryder Cup course after the Junior Ryder Cup but before the Ryder Cup.

Tony Jacklin: Anthony Jacklin CBE (born 7 July 1944) is an English golfer, who was the most successful British player of his generation, winning two major championships.  He was also the most successful European Ryder Cup captain ever.

Supporting paragraphs: 2010 U.S. Open (golf) Tony Jacklin
Answer: 1970