SAN FRANCISCO, CA - MAY 21: Matt Cain #18 of the San Francisco Giants pitches against the Chicago Cubs in the top of the first inning at AT&T Park on May 21, 2016 in San Francisco, California. (Photo by Thearon W. Henderson/Getty Images)
SAN FRANCISCO, CA - MAY 21: Matt Cain #18 of the San Francisco Giants pitches against the Chicago Cubs in the top of the first inning at AT&T Park on May 21, 2016 in San Francisco, California. (Photo by Thearon W. Henderson/Getty Images)