Astros 8
Rangers 2

HOUSTON — Rick Ankiel and the Houston Astros made an impressive debut in the American League, trouncing the Texas Rangers, 8-2, Sunday night in the first Major League Baseball game of 2013 and giving Bo Porter a win in his first game as manager.

Ankiel launched a pinch-hit three-run shot for the first home run this season, Bud Norris pitched well for the win, and Erik Bedard threw 3 scoreless innings for his first career save.

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Having switched from the National League to the AL in the offseason, the Astros earned their first Opening Day victory since 2006 and the 4,000th regular-season win in franchise history.

The Astros are coming off consecutive 100-loss seasons and have the lowest payroll in the majors, prompting many to predict they will be the worst team in baseball. But Houston opened in style wearing spiffy new uniforms that brought back the orange and blue of old-school Astros teams.

Justin Maxwell added a pair of triples and made a nifty catch in center field.

Norris allowed five hits and two runs with five strikeouts in 5 innings. He was one of five Astros making their first Opening Day start on baseball’s second-youngest team.

Bedard shut down the Rangers on one hit the rest of the way for his first save in a 10-season career.

As Houston began a new era with the move to the AL, the Rangers were embarking on a new chapter without 2010 AL MVP Josh Hamilton. Along with Hamilton’s departure to the Angels, Texas also lost catcher Mike Napoli and infielder Michael Young.

The loss snapped a streak of four straight Opening Day victories by the Rangers. Former Astros star Lance Berkman had two hits in his first game as Texas’s designated hitter.

Matt Harrison, who signed a $55 million contract this offseason, yielded six hits and five runs and tied a career high with nine strikeouts in 5 innings.

Maxwell’s two-out triple in the fourth inning broke a scoreless tie and gave Houston a 2-0 lead. The ball bounced off the wall in left field and scored Brett Wallace and Carlos Pena, who both got on with singles. Umpires reviewed the play to make sure it wasn’t a home run.

An error by right fielder Nelson Cruz let Houston score a run in the fifth, and Jose Altuve singled home another.

Harrison put runners at first and second with walks in the sixth and was replaced by Derek Lowe with two outs. Ankiel, a one-time pitcher with St. Louis, connected on his fifth career pinch-hit homer, a full-count shot to right field that made it 7-2.

Norris had a tough second inning and needed 26 pitches to escape, striking out Mitch Moreland. Norris got on a roll from there, retiring nine of the next 10 batters.

Norris ran into trouble in the sixth when Ian Kinsler drew a walk and Berkman hit a one-out single. David Murphy’s two-out single sent Kinsler home to make it 4-1. Cruz followed with a single that scored Berkman and chased Norris.