Merrill Kelly and four relievers shut down the Philadelphia Phillies' powerful lineup as the Arizona Diamondbacks forced a deciding Game 7 of the National League Championship Series with Monday's 5-1 win.

With the Diamondbacks facing elimination at a hostile Citizens Bank Park, Kelly rose to the occasion by striking out eight over five innings and holding the potent Phillies to one run on three hits. The veteran right-hander ended his stellar Game 6 performance by retiring Philadelphia sluggers Kyle Schwarber, Trea Turner and Bryce Harper in order, with two of the outs via strikeout.

Ryan Thompson, Andrew Saalfrank, Kevin Ginkel and Paul Sewald limited the Phillies to three singles the rest of the way to send the series to Tuesday's winner-take-all game in Philadelphia, where the defending NL champion Phillies outscored Arizona by a 15-3 margin in winning the first two matchups.

The underdog Diamondbacks, the NL's sixth and final playoff seed, will send rookie Brandon Pfaadt to the mound opposite Ranger Suarez in a rematch of Game 3 starters. Arizona won that contest, 2-1, with Pfaadt throwing 5 2/3 scoreless innings.

Tommy Pham and Lourdes Gurriel Jr. hit back-to-back solo homers in the second inning to back Kelly's strong outing, while Ketel Marte had two hits and two RBIs.

Pham and Gurriel's consecutive blasts of Aaron Nola gave Arizona a 2-0 lead, and the Diamondbacks tacked on another run in the second when Alek Thomas followed with a walk and scored on Evan Longoria's double.

The Phillies got a run back in their half of the second when J.T. Realmuto doubled and scored on Brandon Marsh's single, but provided few offensive threats the rest of the way to lose for the first time in seven home games this post-season.

Philadelphia has homered three times in each of its three wins in this series, but has just one combined in the three losses.

Nola didn't make it out of the fifth inning, as Marte ended his night with a one-out RBI triple that extended Arizona's advantage to 4-1. The right-hander, who went 3-0 with a 0.96 ERA over his first three starts of this year's playoffs, was tagged for four runs in 4 1/3 innings.

Marte also drove in the Diamondbacks' final run with a seventh-innng single that brought in Geraldo Perdomo, who reached on a single and stole second.