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Nick Wass, Associated Press
Baltimore Orioles starting pitcher Jeremy Guthrie delivers against the Los Angeles Angels during the second inning of a baseball game on Sunday, July 24, 2011, in Baltimore.

BALTIMORE — Tyler Chatwood allowed two runs in seven innings, Mike Trout and Torii Hunter homered in a five-run eighth, and the Los Angeles Angels beat the Baltimore Orioles 9-3 Sunday.

The Angels were protecting a 3-2 lead in the eighth before turning the game into a rout against reliever Mark Worrell. After Trout hit his first major league homer, a three-run drive, Hunter followed a walk to Maicer Izturis with a shot into the left-field seats.

The 19-year-old Trout was batting .162 with two RBIs before connecting on a 3-1 pitch. Trout, who made his debut on July 8, is the youngest player in the majors.

Chatwood (6-6) gave up six hits, struck out four and walked none in lowering his ERA on the road to 3.21.

Alberto Callaspo had three hits for the Angels, who took two of three from Baltimore to improve to 10-1 in their last 11 series.

Nick Markakis homered and had three hits for the Orioles, and Adam Jones hit his 18th of the season and second in two games. Jones has five homers and 11 RBIs in his last nine games, and is one short of matching his career single-season high for home runs

Jeremy Guthrie (4-14) allowed three runs, six hits and four walks in seven gritty innings. He leads the majors in loses despite carrying a 4.33 ERA.

The loss ruined Baltimore's bid to secure its first series win since June 24-26 against Cincinnati. The Orioles are 0-6-1 since then.

Baltimore hit into two double plays, making it six over two games. Although they totaled 20 hits on Saturday and Sunday, the Orioles scored only six runs and finished with seven in the series.

Los Angeles went up 1-0 in the third. With two outs, Hunter broke a 2-for-31 skid with a double and Bobby Abreu grounded an RBI single into right field.

Taking advantage of two walks, the Angels upped their lead to 3-0 in the fourth. A leadoff walk, a double by Howie Kendrick and a sacrifice fly by rookie Mark Trumbo produced a run, and after Guthrie walked No. 9 hitter Bobby Wilson, Izturis hit an RBI double off the glove of first baseman Derrek Lee.

Baltimore closed to 3-2 in the sixth. After Markakis singled with two outs, Jones hit a 2-0 pitch an estimated 446 feet over the center field wall. It was the first home run allowed by Chatwood in seven starts since June 6.

Following the Angels' big eighth inning, Trumbo added an RBI single in the ninth. Markakis connected in the bottom half off Bobby Cassevah.

NOTES: The Angels continue their 10-game road trip Monday in Cleveland, where Los Angeles RHP Dan Haren will vie for his 11th win. ... Guthrie did not yield a homer for only the second time in his last six starts. ... Markakis entered the game in a 1-for-16 funk. ... The crowd of 15,676 was the Orioles' lowest at home on a Sunday this season. ... Callaspo's three hits tied a season high.