WASHINGTON — Rookie Mike Leake allowed an unearned run over seven innings to remain unbeaten and the Cincinnati Reds defeated the Washington Nationals 5-1 on Saturday night.

Leake (5-0) allowed seven hits, walked none and struck out five, becoming the first pitcher in Reds history to go undefeated after 11 major league starts. The right-hander is the first Cincinnati starting pitcher to win his first five decisions since Santo Alcala in 1976.

He also singled twice in three at-bats, raising his average to .417.

The Reds used RBI doubles by Joey Votto and Orlando Cabrera and run-scoring singles by Brandon Phillips and Jay Bruce to break a two-game skid.

Washington’s Luis Atilano (5-2) gave up two runs — one earned — and six hits in seven innings.

The Reds took advantage of an error for a 1-0 lead in the first, when leadoff hitter Cabrera reached on third baseman Ryan Zimmerman’s wide throw. After Phillips bounced into a fielder’s choice, Votto hit an RBI double into the right-field corner.

Cabrera doubled home Leake in the fifth, making it 2-0. Leake singled to center and scored when Cabrera pulled a ball into the left-field corner. It was the third two-hit game this season for Leake, who has hit safely in seven of 11 starts.

Votto’s error allowed Washington to cut the lead in half in the sixth. With two outs and runners on first and second, Votto couldn’t catch Roger Bernadina’s soft liner, allowing Zimmerman to score from second.

Cincinnati added three runs in the eighth against the Nationals’ bullpen. Cabrera led off with a double to left-center — missing a homer by a foot — and Phillips, after twice failing to lay down a bunt, drove him in with a single up the middle off Tyler Walker.

Sean Burnett relieved and threw a wild pitch. Phillips was awarded third base when third base umpire Dan Bellino ruled that shortstop Ian Desmond impeded Phillips’ progress between second and third, and Nationals manager Jim Riggleman was ejected by Bellino for protesting the call.

Votto then walked and, with the infield in, Scott Rolen grounded to short. Phillips scored when catcher Wil Nieves dropped Desmond’s throw after being bowled over at the plate. After Jonny Gomes struck out, Bruce delivered an RBI single to right for a 5-1 lead.

Home plate umpire Joe West ejected Nationals reliever Miguel Batista for hitting Phillips in the ninth.

Friday’s Game

WASHINGTON (AP) — Ian Desmond hit a RBI single to break a seventh-inning tie, and was then at the center of a wild sacrifice-fly double-play two plays later as the Washington Nationals beat the Cincinnati Reds 4-2.

Josh Willingham led off the seventh with a single, and Roger Bernadina reached on an error when centerfielder Drew Stubbs collided with left fielder Jonny Gomes. Desmond’s RBI single gave Washington a 3-2 lead, and a sacrifice bunt put runners on second and third with one out.

Willie Harris lifted a short fly ball to center field. Stubb’s throw home bounced off the mound and high in the air, allowing Bernadina to score. Desmond took off for third and beat the throw but his foot appeared to come off the bag. Dusty Baker argued the call and crew chief Joe West overturned the call. As the Nationals argued, West threw Desmond out of the game.