Luke Scott homered, Melvin Mora hit a tiebreaking double in the fifth inning and the Baltimore Orioles beat the Washington Nationals 5-3 Friday night for their sixth win in seven games.

Left-hander Garrett Olson (3-0) struggled through five innings but remained undefeated in four starts since being recalled from Triple-A Norfolk on April 29. Olson allowed three runs and nine hits while striking out three.

The wild two-run fifth inning by Baltimore _ two baserunners were thrown out and Washington outfielders twice misjudged fly balls _ broke a 3-all tie and gave the Orioles their third consecutive come-from-behind victory. It also snapped Baltimore's four-game losing streak to the Nationals.

Brian Roberts led off with a triple off the wall in right field against Shawn Hill (0-1). Roberts, who reached third when the ball caromed past Elijah Dukes and into short right, scored when center fielder Lastings Milledge misplayed Mora's fly ball to right-center.

After Nick Markakis struck out, Mora was tagged out during a rundown between second and third when Aubrey Huff hit a sharp comebacker to Hill. Kevin Millar followed with an RBI single to center, but was thrown out trying to advance to second after Huff scored for a 5-3 Orioles lead.

Matt Albers worked two scoreless innings, Jim Johnson struck out the side in the eighth and George Sherrill got the final three outs for his 16th save in 18 tries.

Hill allowed five runs _ four earned _ on eight hits, walked two and struck out three.

Ryan Zimmerman's two-run single, the first of his three hits off Olson, staked Washington to a first-inning lead. Felipe Lopez singled and Cristian Guzman doubled before Zimmerman shot a line drive to left field.

Baltimore tied it in the second when Markakis hit into a bases-loaded fielder's choice, and second baseman Lopez's relay to first for an attempted double play sailed wide, scoring another run.

A bases-full sacrifice fly by Dukes restored the Nationals' lead in the fourth, but Scott tied the game with a solo homer to right-center, his third of the year, in the bottom of the inning.