Contreras went 2-for-5 with a three-run homer and two runs scored overall in Friday's 13-2 victory over the Cardinals.
The 24-year-old capped off a five-run second for the Cubs by plating Jorge Soler and Addison Russell with a 416-foot shot to left center, his second homer in the last four games. Contreras has also hit safely in four straight and boasts a .345 average (10-for-29) with two homers and six RBI in the nine August games he's been active for.