CINCINNATI -- Todd Frazier doubled leading off the bottom of the ninth inning and scored on right fielder Gregory Polanco's error, helping the Cincinnati Reds complete the three-game sweep of the Pittsburgh Pirates with a 3-2 victory on yet another rainy afternoon at Great American Ball Park.

With the score tied 2-2 in the ninth, Frazier doubled to left-center field off right-hander Rob Scahill (0-1) and advanced to third on catcher Devin Mesoraco's groundout.

After right fielder Jay Bruce was intentionally walked, left fielder Marlon Byrd's line drive to right was misplayed by Polanco for an error. Frazier trotted home with the winning run.

Reliever Aroldis Chapman (1-0) picked up the victory for Cincinnati.

Reds first baseman Joey Votto and Pirates first baseman Pedro Alvarez each homered for the first time this season.

The game was delayed one hour and 14 minutes by rain, the third straight rain-delayed game in the series.

Right hander Anthony DeSclafani, making his Reds regular-season debut after being acquired from the Miami Marlins in December, didn't allow a hit until Polanco's single leading off the fourth. DeSclafani walked one and struck out four.

The storms rolled in during the fourth inning with the game scoreless and the teams combining for three hits.

After the rain delay, both DeSclafani and Pirates starter A.J. Burnett returned to the mound.

DeSclafani scuffled in the fifth, allowing two singles and hitting a batter to load the bases with two outs.

Polanco legged out an infield single to drive home Pittsburgh's first run. But DeSclafani got center fielder Andrew McCutchen to ground into a fielder's choice to end the inning.

With two outs in the sixth, Alvarez launched the 2,500th home run in Great American Ball Park history, putting the Pirates ahead 2-0.

DeSclafani's afternoon ended after six innings, allowing two runs and five hits. He walked one and struck out six while throwing 73 pitches.

Cincinnati tied the score 2-2 when Votto launched Burnett's 1-2 pitch just over the leaping McCutchen in center for a two-run homer.

Votto's homer accounted for the only two runs allowed by Burnett, who gave up four hits and a walk and had seven strikeouts.

NOTES: Reds 1B Joey Votto homered for the first time since May 10. ... Three rain delays in the series totaled four hours and 23 minutes. Last year, Cincinnati had 23 games delayed by rain, including 18 at home. ... Wednesday night's Reds-Pirates game ended at 1:46 a.m. EST, making it the eighth latest-ending game in Pittsburgh franchise history. ... Pirates CF Andrew McCutchen went 0 for 5 on Wednesday night, ending his 11-game hitting streak at Great American Ball Park. ... Clint Hurdle remained three wins behind Lloyd McClendon for ninth place on the Pirates' career managerial wins list. Hurdle's 333 victories rank fifth among active MLB managers.