Merrill Kelly understands the David vs. Goliath storyline permeating the National League Championship Series. But after knocking off two division champions earlier this month, Kelly and the 84-win Arizona Diamondbacks -- two years removed from a 110-loss season and with one player making more than $10 million this year -- will have their slingshot ready to go in their biggest game yet on Tuesday night. The Diamondbacks will look to continue their unlikely October run and the Phillies will look to return to the World Series when Arizona visits Philadelphia for Game 7 of the NLCS. Rookie right-hander Brandon Pfaadt (0-0, 2.13 ERA this postseason) is slated to start for the Diamondbacks against left-hander Ranger Suarez (1-0, 0.64). The Diamondbacks forced the winner-take-all finale Monday night, when Tommy Pham and Lourdes Gurriel Jr. hit back-to-back homers to open the second inning and Kelly gave up one run over five frames in a 5-1 victory. Tuesday's winner will begin the World Series on Friday against the Texas Rangers, who clinched the American League pennant by rolling to an 11-4 win over the Houston Astros in Game 7 of the AL Championship Series on Monday night. The Rangers will have home-field advantage in the Fall Classic regardless of who they play. We like the Phillies to come through here regardless of what the public thinks. Let's roll with Philly to get it done here Tuesday.