The Cardinals and D-backs face off Wednesday in an exclusive digital-only broadcast in the series finale of the three-game set in Phoenix.

The matchup in the desert will be the final this season in the MLB Game of the Week Live on YouTube series. First pitch from Phoenix is set for 3:40 p.m. ET and can be viewed for free on MLB’s official YouTube page.

The Cardinals are on the precipice of clinching their first National League Central crown since 2015, as their magic number sits at three. The D-backs, who have been eliminated from postseason contention, will try to play spoiler.

St. Louis sends right-hander Michael Wacha to the hill. Wacha has pitched well since the calendar flipped to September and is 0-1 with a 1.80 ERA in four starts this month.

Arizona starter Merrill Kelly has also had his fair share of success this month and is on a 15-inning scoreless streak. Kelly has gone six innings-plus and allowed three runs or fewer in all four of his starts in September.

The D-backs have been forced to find new ways to score runs without spark plug Ketel Marte. Marte had his season cut short on Friday due to a stress reaction in his back. Marte still leads the team in batting average, runs scored, hits, doubles and OPS.