Arenado is now hitting .353 (35-for-99) with four home runs, eight doubles, 16 RBIs and 15 runs scored during his streak.
The homer gave the Rockies a 2-0 lead.
Thomas Harding is a reporter for MLB.com. Follow him on Twitter @harding_at_mlb. This story was not subject to the approval of Major League Baseball or its clubs.