UNDATED (AP) — The Boston Red Sox have opened their latest World Series title defense by winning their first series of the season.

David Ortiz had three of Boston's 12 hits off Wei-Yin Chen in a 4-3 win over the Orioles in Baltimore. Xander Bogaerts (ZAN'-dur BOH'-gahrts) also had three hits for the Red Sox, and Felix Doubrant (doo-BRAHNT') held the Birds to two runs and six hits in 5 2/3 innings.

Boston's bullpen still hasn't allowed a run after blanking the O's on three hits over 3 1/3.

Checking out the rest of the big league finals:

— Emergency starter Tanner Roark (ROH'-ark) allowed two runs and six hits in six innings as the Nats clobbered the New York Mets 8-2 to complete a three-game sweep. Roark started in place of Jordan Zimmermann, who developed a fever overnight and was throwing up this morning. Ryan Zimmerman homered and tied a career high with four hits for the Nationals, who outscored the Mets 22-10 in the series.

— Jhonny (JAH'-nee) Peralta hit a two-run homer and Matt Adams went 3-for-5 with two runs scored as St. Louis outscored the Reds 7-6 in Cincinnati. Lance Lynn gave up three runs in five innings but settled down after allowing back-to-back homers to Jay Bruce and Todd Frazier in the Reds' three-run first. Frazier homered twice and had four RBIs for Cincinnati.

— Angel Pagan hit a three-run home run while San Francisco was scoring five times in the eighth inning of an 8-5 triumph at Arizona. Brandon Belt hit his third home run of the series and Brandon Hicks had a pinch-hit solo shot for the Giants.

— Jason Hammel was sharp in the Chicago Cubs' 3-2 win over the Pirates in Pittsburgh, allowing one run and two hits over 6 2/3 innings. Mike Olt hit his first career homer and Emilio Bonifacio went 2 for 4 with two runs scored as the Cubs avoided a three-game sweep.

— Casey McGehee (mih-GEE') had three RBIs and Giancarlo Stanton singled home the go-ahead run with two outs in the eighth inning to lead Miami's 8-5 win over Colorado. The Marlins scored 27 runs in taking three of four in the series. McGehee has eight RBIs and Stanton seven through four games.

— Third baseman Yangervis Solarte went 3-for-3 with an RBI in his first major league start as the New York Yankees doubled up Houston 4-2 to avoid a three-game sweep. Derek Jeter picked up his first RBI of his final season and David Robertson notched his first save since taking over as closer for the retired Marian Rivera. Winning pitcher Ivan Nova allowed two runs and six hits while walking five in 5 2/3 innings.

— Evan Longoria broke open a close game by smacking a three-run homer in the seventh inning of Tampa Bay's 7-2 win over Toronto. David Archer allowed two runs and four hits while striking out seven in six innings, one day after inking a multi-year pact with the Devil Rays.

— Chris Colabello helped the Minnesota Twins avoid a season-opening sweep by the Chicago White Sox. Colabello doubled twice and had six RBIs, but the Twins blew a 5-1 lead and needed to score twice in the ninth to beat the White Sox 10-9. Oswaldo Arcia tripled home the go-ahead run.

— Oakland beat Seattle 3-2 on Coco Crisp's leadoff homer in the bottom of the 12th. Crisp also scored the tying run in the eighth on a triple by Yoenis Cespedes (yoh-EH'-nehs SEHS'-peh-dehs).

— Kansas City's game with Detroit was postponed by rain and will be made up June 19.