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SAN FRANCISCO, CA - MAY 20: Jason Heyward #22 of the Chicaogo Cubs slides into the wall while robbing Denard Span #2 of the San Francisco Giants of a hit in the bottom of the first inning at AT&T Park on May 20, 2016 in San Francisco, California. Heyward slid into the wall and injured himself on the play. (Photo by Thearon W. Henderson/Getty Images)

SAN FRANCISCO, CA - MAY 20:  Jason Heyward #22 of the Chicaogo Cubs slides into the wall while robbing Denard Span #2 of the San Francisco Giants of a hit in the bottom of the first inning at AT&T Park on May 20, 2016 in San Francisco, California. Heyward slid into the wall and injured himself on the play.  (Photo by Thearon W. Henderson/Getty Images)