By Larry Fine FARMINGDALE, New York, Aug 23 (Reuters) - Scotsman Russell Knox sits fourth on the FedExCup points list but may need a strong showing at The Barclays, which opens the lucrative PGA Tour playoffs this week, to join the European Ryder Cup team. Knox has won twice this season and had a pair of runner-up finishes but landed outside the group of nine automatic qualifiers because his win at the WGC-HSBC Champions in China did not earn him Ryder Cup points as he was not a European Tour member at the time. European captain Darren Clarke will announce on Aug. 30 three picks to complete a team that will go for an unprecedented fourth win in a row against the U.S. in the biennial event at Hazeltine in Minnesota starting on Sept. 30. More...