CINCINNATI - The postseason will start at PNC Park.
Neil Walker hit two of Pittsburgh's six homers - its biggest power surge in six years - and the Pirates clinched home-field advantage for the National League's wild card playoff game by beating the Cincinnati Reds 8-3 on Saturday.
Pittsburgh will play host the Reds on Tuesday night in the Pirates' first playoff appearance in 21 years. They went 50-31 at PNC Park, the third-best home record in the NL.)
Pittsburgh hit five homers off Bronson Arroyo (14-12), who had never given up that many in a game. Walker homered twice off the right-hander, Andrew McCutchen and Pedro Alvarez also hit solo homers, and Marlon Byrd had a two-run shot that ended Arroyo's outing in the fifth and made it 6-3.
Prospect Andrew Lambo hit his first homer off Logan Ondrusek, the first time the Pirates had six in a game since Aug. 22, 2007 at Colorado.
Pirates starter Charlie Morton also struggled, leaving with one out and the bases loaded in the fifth. Vin Mazzaro (8-2) fanned Zack Cozart and retired Ryan Hanigan on a fly ball as the slumping Reds left the bases loaded for the second time in the game.
Cincinnati stranded 11 runners overall. Hundreds of Pirates fans chanted "Let's Go Bucs!" as Jay Bruce grounded out with a runner aboard to end it.
Both teams already had clinched wild-card berths heading into their weekend series. Whoever took it would play host to the one-game showdown. Pittsburgh made quick work of it, winning the opener 4-1 on Friday night and then the second game, too.
The Ohio River rivals have met five times in the playoffs - 1970, 1972, 1975, 1979 and 1990, when the Reds won their last World Series title. The Reds are 13-7 against the Pirates in the postseason. Pittsburgh has played the Reds more than any other team in the playoffs.
The Reds have gone into a deep slump at a very bad time. They've lost four in a row since clinching a playoff spot with a 3-2 win over the Mets on Monday night, scoring a total of six runs.
They were at it again in the first inning on Saturday, leaving the bases loaded when Todd Frazier flied out.
Walker and McCutchen hit back-to-back homers in the third for a 2-0 lead. Brandon Phillips had an RBI single and Jay Bruce followed with a two-run double for a 3-2 lead in the third, Cincinnati's first lead since Monday.
And it didn't last long.
Alvarez led off the fourth inning with a first-pitch homer, tying it at 3. Alvarez's 36th homer gave him 100 RBIs. Walker hit his career-high 16th homer in the fifth inning - the first multihomer game of his career - and Byrd's two-run shot ended Arroyo's outing. Walker has seven homers in September.
Lambo's pinch-hit homer let the Pirates tie the record for most by a visiting team at Great American Ball Park, which opened in 2003.
Notes: Walker has homered in five of his last nine games. ... Alvarez is the first Pirates third baseman to drive in 100 runs since Aramis Ramirez drove in 110 in 2001. His 36 homers are a club record for a third baseman. ... Byrd had three hits for the second straight game. ... Philips fouled a pitch off his left shin in the fifth inning, raising a welt. He singled and left for a runner. X-rays were negative. ... Joey Votto walked three times, moving him ahead of Joe Morgan's previous club record for a season. Votto has walked 135 times.
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Copyright 2013 The Associated Press.