BOSTON – Chris Davis drove in the go-ahead run with a single in the top of the 13th inning and the Baltimore Orioles outlasted the Boston Red Sox 6-4 on Friday night.

Mark Reynolds, who hit his first homer of the season in the third, added a sacrifice fly in the 13th, and Jim Johnson put Boston down in order to end the game after 4 hours and 37 minutes.

Troy Patton (1-0) pitched two scoreless innings and Johnson picked up his eighth save.

Franklin Morales (0-1) allowed two hits in 2/3 of an inning in Boston’s eighth loss in its last nine home games.

Matt Wieters hit a one-out single off Morales in the top of the 13th and Wilson Betemit walked before Davis singled to right. Boston Manager Bobby Valentine then brought in reliever Scott Atchison, who allowed Reynolds’ sacrifice fly to center.

Baltimore has won nine of its last 11 and extended Boston’s losing streak to three.

Adrian Gonzalez had three hits for the Red Sox, who took three leads but couldn’t hang on to any of them.

The Red Sox had a chance to pull ahead in the bottom of the eighth when David Ortiz led off with a walk, but he got caught going too far on a line drive by Cody Ross. Shortstop J.J. Hardy made a diving grab, then threw a strike to first from his knees to double up Ortiz.

Baltimore starter Wei-Yin Chen was pulled after reaching 100 pitches in just five innings.

Boston’s Jon Lester lasted only slightly longer, going six innings before Vicente Padilla started the seventh with the Red Sox holding a 4-3 lead. That was gone quickly, after Baltimore loaded the bases with nobody out. J.J. Hardy grounded into a double play, allowing Reynolds to score. The run snapped a streak of 11 scoreless innings by Boston relievers over three games.

Will Middlebrooks, playing in his second major-league game, hustled for a double to lead off the fifth and scored on Dustin Pedroia’s single for a 4-3 Boston lead.

The Orioles had three errors before the second inning was over, and a passed ball by catcher Ronny Paulino allowed Ross to score and put Boston up 1-0 in the second.

Reynolds snapped an 0-for-13 skid with a leadoff homer over the Green Monster in the third to tie it, then Boston took the lead right back with a pair of runs in the bottom half.

RED SOX pitcher Mathew Price has been suspended for 50 games because of a second violation for a drug of abuse under the minor league drug program.

A 22-year-old right-hander from Virginia Tech taken in the eighth round of the 2010 amateur draft, Price had made one appearance this season for Class A Greenville of the South Atlantic League. He had been on the disabled list since April 5.

The suspension announced Friday was the 40th this year under the minor-league program, including 15 for drugs of abuse.

OUTFIELDER CARL Crawford is a bit of a forgotten man at the moment.

The Red Sox shifted him to the 60-day disabled list, retroactive to April 4, to make room for Aaron Cook on the active roster..

But Crawford, who started the season on the DL because of a wrist injury, continues to work toward a return in June or July from an ulnar collateral ligament strain in his left elbow that had Red Sox fans fearing he needed Tommy John surgery.

In an interview, Crawford discussed the latest setback, tracing the elbow problem back to some long toss in Houston last July while he was on the disabled list for a hamstring strain.

“That’s when the pain first started,” he said. “My whole elbow was really, really sore, and it stayed like that for the rest of the year. I got an injection, but it didn’t really help too much.”