The 1964 United States Grand Prix was won by Graham Hill of BRM. Despite being on pole position in United States of America, Jim Clark could not convert this into a win. Clark was forced to retire in lap 54 due to: Injection.
The race in United States of America was round 9 of 10 of the 1964 season.
The 1964 United States Grand Prix was a Formula One motor race held on October 4, 1964, at the Watkins Glen Grand Prix Race Course in Watkins Glen, New York. It was race 9 of 10 in both the 1964 World Championship of Drivers and the 1964 International Cup for Formula One Manufacturers. The 110-lap race was won by BRM driver Graham Hill after he started from fourth position. John Surtees finished second for the Ferrari team and Brabham driver Jo Siffert came in third.
source: Wikipedia
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