The1972 National League Championship Series was the semifinal round inMajor League Baseball’s1972 postseason played between theCincinnati Reds and thePittsburgh Pirates from October 7 to 11. It was the fourthNLCS. Cincinnati won the series three games to two to advance to theWorld Series against theOakland Athletics. The Reds became the first team in major league history to advance to the World Series without the best record in their respective league, made possible by the Junior and Senior Circuits each splitting into two divisions in 1969. In the previous three post seasons, the team with the best record in each league advanced to the World Series.

The 1972 NLCS ended with a dramatic ninth inning rally in the fifth and deciding game. The series was also notable as the last on-field appearance by Pittsburgh's future Hall of FamerRoberto Clemente, who would die in a plane crash on December 31.

Cincinnati won the series, 3–2.

The Reds got a first-inning homer from second basemanJoe Morgan to take a short-lived 1–0 lead. But Pittsburgh bounced back with three in the bottom of the inning, highlighted by an RBI triple fromAl Oliver and an RBI double fromWillie Stargell. Pittsburgh never looked back, getting a two-run homer from Oliver in the fifth and coasting to the win behind the strong pitching ofSteve Blass. The frustrated Reds ultimately stranded 11 baserunners, and their managerSparky Anderson was ejected in the fourth inning. The time of game was a brisk 1 hour and 57 minutes.

Cincinnati bounced back to even the series in Game 2. Pittsburgh starterBob Moose allowed five consecutive hits to start the game.Bobby Tolan andTony Pérez both hit two-run doubles to give the Reds a 4–0 lead and chase Moose. The Pittsburgh bullpen stopped the Reds offense, though, and the Pirates came back to make it a 4–3 game with single runs in the fourth, fifth and sixth, asMilt May,Roberto Clemente andDave Cash picked up RBIs.Joe Morgan homered in the eighth to give the Reds a crucial insurance run, and Cincinnati relieverTom Hall finished a long and strong relief stint to get the victory.

The series moved to Cincinnati and produced a tense, low-scoring contest. Cincinnati'sDarrell Chaney andBobby Tolan hit RBI singles in the bottom of the third to give the Reds a 2–0 lead. In the fifth, Pittsburgh catcherManny Sanguillén homered to cut the lead in half, andRennie Stennett tied the game at 2 in the seventh with an RBI single. The Pirates scored the go-ahead run in the eighth on a groundout by Sanguillen. Pirates closerDave Giusti, came on in the eighth to shut the door on the Reds and earn the save.

The Reds evened the series in Game 4 behind a sparkling two-hitter from left-handed hurlerRoss Grimsley. The Reds scored three runs off Pirates starterDock Ellis, aided by Pittsburgh errors in the first and fourth. Grimsley singled in another run in the sixth and the Reds eventually added three more. The run support was more than enough for Grimsley as he held the typically potent Pirates' offense in check. He yielded just two hits, both byRoberto Clemente. Pittsburgh got its lone run on a seventh-inning homer by Clemente.

Game 5 proved to be one of the more memorable postseason contests in baseball history. After rain delayed the start of the game for 90 minutes, Pittsburgh took an early 2–0 lead with second-inning RBIs fromRichie Hebner andDave Cash. The Reds got one back in the third on an RBI double byPete Rose. But Pittsburgh inched further ahead with another run-scoring hit from Cash in the fourth.César Gerónimo cut the Pirates' lead to 3–2 with a homer in the fifth. The Pirates held onto their 1-run margin until a dramatic bottom of the ninth.

With the defending World Series champion Pirates three outs away from returning to defend their title, Reds catcherJohnny Bench hit a 1–2 backdoor changeup off Pittsburgh closerDave Giusti over the right field wall for a home run to tie the game.Tony Pérez singled and was replaced by pinch-runnerGeorge Foster.Denis Menke followed with another single as Foster moved to second base. With the count 2–0 on Geronimo, Giusti was replaced with Game 2 starterBob Moose. Geronimo's fly ball out advanced Foster to third base, but Moose induced shortstopDarrell Chaney to pop out as Foster stayed at third. Just when it looked like Moose might wiggle out of a tough two-on, no out situation, he uncorked a wild pitch to pinch-hitterHal McRae scoring Foster with the winning run, as the hometown fans and the Reds players celebrated a return to the World Series to face theOakland A's. It was only the second time a postseason series ended on a wild pitch, the other being the1927 World Series in which the Pirates lost to the Yankees in a four-game sweep.

1972 NLCS(3–2):Cincinnati Reds overPittsburgh Pirates

• Baseball-reference.com – 1972 NLCS

• 1972 Major League Baseball season
• Cincinnati Reds postseason
• Pittsburgh Pirates postseason
• National League Championship Series
• 1972 in sports in Ohio
• 1972 in sports in Pennsylvania
• 1970s in Cincinnati
• 1970s in Pittsburgh
• October 1972 sports events in the United States
• Baseball competitions in Cincinnati
• Baseball competitions in Pittsburgh

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