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(SportsNetwork.com) - Rain put a hold on the San Diego Padres' chances of keeping their winning streak intact, so they're scheduled for a day-night doubleheader Thursday with the Cincinnati Reds at Great American Ball Park.

Wednesday's contest was postponed because of rain in the Cincinnati area.

The Padres made it four straight wins with Tuesday's 2-1 victory over the Reds in the series opener, as Chase Headley belted a solo home run with two out in the top of the ninth inning.

"Just one pitch," said Cincinnati catcher Brayan Pena of the ball Headley hit out. "We left it a little bit up, and it really cost us the game."

Seth Smith had two of San Diego's three hits and starting pitcher Andrew Cashner pitched well in the no-decision, allowing only a run in seven innings.

Huston Street closed the door in the ninth for his 12th save.

San Diego is 6-3 in its last nine games and will hand the ball to Ian Kennedy in Thursday's first game. Kennedy is 2-4 in eight starts with a 3.12 ERA and did not receive a decision in last Thursday's 3-1 loss to Miami, as he permitted only one run in seven innings with 12 strikeouts.

Kennedy is 1-3 in his last four decisions and 3-0 with a 1.53 ERA in four career starts against Cincinnati.

The Reds have lost four of six games and closer Aroldis Chapman was dealt the loss for allowing Headley's game-changing home run.

Mike Leake pitched well in the no-decision and allowed just a run and two hits in eight innings of work.

"Leake couldn't have been any better," said Reds manager Bryan Price. "He had that really nice mix of sinker/cutter going, he was able to drop the breaking ball in there and change when he needed it. Just made pitch after pitch."

Brandon Phillips had three of Cincinnati's seven hits and drove in the lone run in the first inning.

Johnny Cueto will oppose Kennedy this afternoon and aims to build on his last start, which resulted in a no-decision versus Colorado. In the 4-3 win over the Rockies, Cueto gave up two runs in eight innings and struck out eight batters with only one walk.

Cueto has fanned at least eight batters in four of his last five starts and is 3-2 in eight outings with an MLB-leading 1.43 earned run average. The Reds are 4-1 in his last five trips to the hill and the right-hander will make his sixth career start against the Padres. He is 2-2 in the first five.

Cueto, who also leads the majors in innings pitched (63) and opponents' batting average (.138), has lasted at least eight innings in five straight appearances. He hasn't given up more than two runs in each outing.

Tyson Ross gets the start for San Diego in the nightcap and the club has won each of his last three appearances. Ross is 2-0 in that time and is coming off Friday's 10-1 pounding of Miami in which he limited the visiting Marlins to a run and four hits in seven innings.

Ross, a right-hander, has allowed one earned run in each of his past two starts and is 4-3 with a 3.02 ERA in eight trips to the mound. Ross is 1-0 with a 1.00 ERA in two games (1 start) lifetime against the Reds.

Cincinnati could go with Alfredo Simon Thursday night, but may bring up an arm from the minor leagues. If Simon gets the nod, he will try to bounce back from his worst and shortest outing of the season. Simon lasted three innings in Saturday's 11-2 loss to Colorado and was lit up for five runs and eight hits.

Simon is 0-1 in two starts since winning his previous three decisions and the Reds were unbeaten (4-0) before his latest setback. The right-hander is 1-2 in four home starts and will make his first career start against the Padres. Simon has no record and a lofty 8.59 ERA in five relief appearances in this series.

Cincinnati and San Diego split six meetings a season ago.