Oakland Athletics

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Fans stands at their seats after a baseball game between the Oakland Athletics and the Seattle Mariners was postponed for unplayable field conditions in Oakland, Calif., Friday, April 4, 2014. (AP Photo/Jeff Chiu)

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Grounds crew members walk a tarp along the infield after a baseball game between the Oakland Athletics and the Seattle Mariners was postponed for unplayable field conditions in Oakland, Calif., Friday, April 4, 2014. (AP Photo/Jeff Chiu)

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Grounds crew members walk on a tarp covering the infield after a baseball game between the Oakland Athletics and the Seattle Mariners was postponed for unplayable field conditions in Oakland, Calif., Friday, April 4, 2014. (AP Photo/Jeff Chiu)

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Oakland Athletics vice president of stadium operations Dave Rinetti, right, talks to reporters after a baseball game between the Athletics and the Seattle Mariners was postponed for unplayable field condition, in Oakland, Calif., Friday, April 4, 2014. (AP Photo/Jeff Chiu)