Joely Rodriguez took over, and his second pitch got away from catcher Andrew Knapp for a passed ball, allowing both Cubs baserunners to advance. Contreras greeted Rodriguez with a double to left, driving in Zobrist and Heyward, and opening a 4-3 lead. Rodriguez was replaced by Edubray Ramos, and pinch-hitter Matt Szczur welcomed him with an RBI single.
Jake Arrieta drove in a run and picked up the win, scattering six hits over six innings and allowing three runs.
Eickhoff, an Evansville, Ind., native who was originally a 46th-round pick of the Cubs in the 2010 Draft but did not sign, took the loss.