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SACRAMENTO, CA - JUNE 26: Tom Watson of the United States reacts to his birdie on the 15th hole during round two of the U.S. Senior Open Championship at the Del Paso Country Club on June 26, 2015 in Sacramento, California. (Photo by Harry How/Getty Images)

SACRAMENTO, CA - JUNE 26:  Tom Watson of the United States reacts to his birdie on the 15th hole during round two of the U.S. Senior Open Championship at the Del Paso Country Club on June 26, 2015 in Sacramento, California.  (Photo by Harry How/Getty Images)