SAN FRANCISCO (Interstat) — The St. Louis Cardinals and San Francisco Giants, both sitting at 77-80, will play the rubber match of their three-game series on Wednesday at Oracle Park after Tuesday night’s contest was postponed.

The series is knotted after the Cardinals edged the Giants 6-5 on Monday. St. Louis has won three of the last four meetings between the clubs.

Veteran right-hander Sonny Gray (14-8, 3.12 ERA) is set to start for the Cardinals. Gray has been a bright spot in a challenging season, providing consistent innings at the top of the rotation.

He will be opposed by Giants left-hander Robbie Ray (11-8, 3.89 ERA). Ray brings a streak of strong outings into the finale, having allowed two or fewer earned runs in four of his last five starts.

In Monday’s win, Iván Herrera homered for St. Louis, while Heliot Ramos drove in three runs for San Francisco in the losing effort.

According to Interstat’s projection, the Cardinals are forecast for a 4-3 victory. However, oddsmakers have installed the Giants as a 1.5-run favorite, with the over/under set at 7.5 runs.

Following the series, both teams will open their final series of the season on Friday. St. Louis travels to face the Chicago Cubs, while San Francisco hosts the Colorado Rockies.