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BLAINE, MN - AUGUST 07: Billy Casper reacts to his putt during the Greats of Golf exhibition during the second round of the 3M Championship at TPC Twin Cities held on August 7, 2010 in Blaine, Minnesota. (Photo by Michael Cohen/Getty Images)

BLAINE, MN - AUGUST 07:  Billy Casper reacts to his putt during the Greats of Golf exhibition during the second round of the 3M Championship at TPC Twin Cities held on August 7, 2010 in Blaine, Minnesota.  (Photo by Michael Cohen/Getty Images)