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CHICAGO, IL - SEPTEMBER 22: The Chicago Cubs celebrate with Jake Arrieta #49 on his 20th win of the season against the Milwaukee Brewers at Wrigley Field on September 22, 2015 in Chicago, Illinois. The Chicago Cubs won 4-0. (Photo by Jon Durr/Getty Images)

CHICAGO, IL - SEPTEMBER 22:  The Chicago Cubs celebrate with Jake Arrieta #49 on his 20th win of the season against the Milwaukee Brewers at Wrigley Field on September 22, 2015 in Chicago, Illinois. The Chicago Cubs won 4-0.  (Photo by Jon Durr/Getty Images)