Robert Ernie Castillo Jr. (born April 18, 1955 in Los Angeles, California

Los Angeles, California

Los Angeles , with a population at the 2010 United States Census of 3,792,621, is the most populous city in California, USA and the second most populous in the United States, after New York City. It has an area of , and is located in Southern California...

) is a former pitcher

Pitcher

In baseball, the pitcher is the player who throwsthe baseball from the pitcher's mound toward the catcher to begin each play, with the goal of retiring a batter, who attempts to either make contact with the pitched ball or draw a walk. In the numbering system used to record defensive plays, the...

 in Major League Baseball

Major League Baseball

Major League Baseball is the highest level of professional baseball in the United States and Canada, consisting of teams that play in the National League and the American League...

. He played for the Los Angeles Dodgers

Los Angeles Dodgers

The Los Angeles Dodgers are a professional baseball team based in Los Angeles, California. The Dodgers are members of Major League Baseball's National League West Division. Established in 1883, the team originated in Brooklyn, New York, where it was known by a number of nicknames before becoming...

 and Minnesota Twins

Minnesota Twins

The Minnesota Twins are a professional baseball team based in Minneapolis, Minnesota. They play in the Central Division of Major League Baseball's American League. The team is named after the Twin Cities area of Minneapolis and St. Paul. They played in Metropolitan Stadium from 1961 to 1981 and the...

 between and . He was in the bullpen for the Dodgers in the 1981 World Series

1981 World Series

The 1981 World Series matched the New York Yankees against the Los Angeles Dodgers, marking their third meeting in the Series in five years as well as a record eleventh Series meeting overall and last Series meeting to date...

, pitching one inning against the New York Yankees

New York Yankees

The New York Yankees are a professional baseball team based in the The Bronx, New York. They compete in Major League Baseball in the American League's East Division...

. He also pitched one season in Japan for the Chunichi Dragons

Chunichi Dragons

The are a professional baseball team based in Nagoya, the chief city in the Chubu region of Japan. The team is in the Central League. They won the 2007 Japan Series and 2007 Asia Series.-History:...

 in . Castillo is credited with teaching his former Dodgers team-mate, Fernando Valenzuela

Fernando Valenzuela

Fernando Valenzuela Anguamea is a Mexican former left-handed pitcher, most notably with the Los Angeles Dodgers.In 1981, the 20-year-old Valenzuela took Los Angeles by storm, winning his first 8 decisions and leading the Dodgers to the World Championship...

, how to throw a screwball

Screwball

A screwball , is a baseball pitch that is thrown so as to break in the opposite direction of a slider or curveball. Depending on the pitcher's arm angle, the ball may also have a sinking action....

.

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