Red Sox manager John Farrell congratulated Daniel Nava after the win.

Daniel Nava (left) and Jacoby Ellsbury celebrated after the final out of the game.

Daniel Nava reacted after hitting a three-run home run over the Green Monster to break a scoreless tie in the seventh inning.

Nava was greeted by happy teammates and fans after his home run.

Red Sox closer Joel Hanrahan got the save after giving up a run in the ninth inning.

Fenway Park was packed for the home opener against the Orioles under blue skies.

Steve Pearce struck out in the seventh inning.

Fans cheered Red Sox starting pitcher Clay Buchholz after the seventh inning.

Clay Buchholz threw a pitch to Nate McLouth of the Orioles in the first inning at the Fenway home opener.

Jacoby Ellsbury reacted after flying out in the third inning.

Clay Buchholz threw to Mike Napoli at first base as Nate McLouth got back to the bag safely.

Red Sox pitchers John Lackey (left) and Andrew Bailey (center) greeted Jackie Bradley, Jr. during pre-game player introductions.

The Jimmy Fund Chorus sang in the outfield before the game.

Red Sox second baseman Dustin Pedroia chatted with owner John Henry in the dugout before the game.

Clay Buchholz threw a pitch in the first inning as the Red Sox took on the Orioles in the home opener at Fenway.

Jon Lester was all smiles in the dugout before the start of player introductions.

The Red Sox and Orioles lined the field prior to the home opener at Fenway Park.

Jim Rice hugged a smiling Jon Lester following the ceremonial first pitches, as former Red Sox players looked on.

"Big League Brian" Dwyer juggled pins on Yawkey Way.

Matt McClelland of Warwick, R.I. (left), and Keith Couto, of Rumford, R.I., dug into sausage sandwiches.

Lorriane Vallee of Sutton got her face painted before the game.

Blue skies and green grass were in abundance as the Red Sox took batting practice before the home opener against the Orioles.

Fans waited to enter as the doors to Fenway opened on Monday afternoon.

Fans filed into Fenway Park prior to the home opener between the Orioles and Red Sox.

Fans enjoyed the weather on Landsdowne Street before the game.

Orioles general manager (and former Red Sox GM) Dan Duquette talked with former Red Sox rightfielder Dwight Evans.

The Red Sox returned to Fenway Park in first place after a 4-2 season-opening road trip.

Fans Kenny Runge and Nick Freehling watched Orioles batting practice from the Green Monster.