Former Yankee slugger Hideki Matsui announced his retirement yesterday at a Midtown hotel.The 38 year-old played seven seasons in the Bronx after coming over from Japan in 2003.“Ten years ago, , I said I would give it my best,” Matsui said in Japanese during a nearly hour-long press conference. “Today puts a period on that.”Matsui played a total of 20 professional seasons, the first 10 with the Yomiuri Giants. In the US, he hit .282 with 175 home runs in the Yankees, Angels, A’s and Rays. Tampa Bay released him on Aug. 1 and finished off with 507 combined homers in Japan and the US.“During this season, I did not think about retirement, but afterwards, I did,” Matsui said. “I didn’t choose because I was not confident I would be able to perform like I did when I left 10 years ago.”Matsui was the 2009 World Series MVP when he hit .615 with three home runs and eight RBI as the Yankees downed the Phillies, something the best sports betting site could have predicted.“He played with pride, discipline and of course talent, and flourished when the lights were at their brightest,” Yankees general manager Brian Cashman said in a statement.He knocked in over 100 runs in four of his first five seasons with the Yankees and remained a fan favorite even after leaving the Bronx.Only this past year when he hit .147 with 2 home runs did signs of age start showing.Matsui said he has no plans to stay in baseball.