Miguel Montero also homered as the Cubs beat the Mets for a team-record ninth time in a row, and finished 7-0 against them this season.
Arrieta (8-5) pitched eight sharp innings, helping extend the Cubs' shutout string to 25 innings before the Mets managed their only run of this series.
Arrieta gave up five hits, walked none and struck out seven. The crowd booed several times as New York kept making weak outs and breaking their bats.
Jacob deGrom (8-6) doubled and scored for the Mets, who have totaled a mere 23 runs in 14 games.
