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SACRAMENTO, CA - JUNE 25: Tom Watson of the United States smiles as he speaks to the media after a round of 66 to finish 4 under par during round one of the U.S. Senior Open Championship at the Del Paso Country Club on June 25, 2015 in Sacramento, California. (Photo by Harry How/Getty Images)

SACRAMENTO, CA - JUNE 25:  Tom Watson of the United States smiles as he speaks to the media after a round of 66 to finish 4 under par during round one of the U.S. Senior Open Championship at the Del Paso Country Club on June 25, 2015 in Sacramento, California.  (Photo by Harry How/Getty Images)