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Charl Schwartzel of South Africa chips onto the 14th green during the second round of the Byron Nelson Championship golf tournament Friday, May 17, 2013, in Irving, Texas. Schwartzel ended the day at 7 under par for the tournament. (AP Photo/Tony Gutierrez)

Charl Schwartzel of South Africa chips onto the 14th green during the second round of the Byron Nelson Championship golf tournament Friday, May 17, 2013, in Irving, Texas. Schwartzel ended the day at 7 under par for the tournament. (AP Photo/Tony Gutierrez)