Carlos Pena's mother, father and sister Femaris attend Thursday's game at Yankee Stadium. (MLB.com)

Peña's parents came to New York from their home in the New England area for the A's three-game series with the Yankees, and after Thursday's series finale, Peña's father Felipe talked at length about watching his son play in the Major Leagues for the first time. In the second part of three guest appearances in 'Carlos' Corner' Felipe Peña talks about the special way he communicates with his son.

AUDIO: Listen to Felipe perform 'The Whistle'

NEW YORK -- When I was reading the Carlos' Corner about "The Whistle," it was a surprise for me. I wasn't expecting him to talk about that.

Carlos knows exactly the meaning of this whistle. It not only means that I am there for him, but I also use it to say to him: Whenever you hear the whistle, think about this message: Don't be distracted, get some rest, get the right food, you need to eat, workout, stretch - everything he needs to do to be successful.

The whistle also tells him to clear his mind from external non-baseball thoughts and that he needs to bring these things to the plate: Concentration, consistency and confidence.

I am reminding him that he needs to be all business up there, 100 percent, so whenever he hears it, he knows - not only is his family here, but that he needs to be all business.

The sound of the whistle has a history.

I want to express my sad feeling because we lost one of my younger brothers this year on February 1. My brother Rafelo died in a car accident in Anchorage, Alaska.

When I got married to Carlos' mother, I wanted to continue a family tradition my older brother had done for me.

We grew up in a middle-sized city in the Dominican Republic, but growing up, we went to the capital - Santo Domingo - to go to school and get a job when we were old enough. I stayed with my older brother through that, so when my younger brothers Rafelo, was old enough, he and my other two younger brothers came and stayed with us.

At that time we had Carlos, our first child. When they moved in with us, Carlos spent time with them. My brothers were very active in sports - baseball, basketball, volleyball - and they used to carry Carlos on their shoulders everywhere.

Rafelo used to call Carlos "Carlos, Carlos," and he extended that, and didn't call Carlos by his name, but by whistle.

AUDIO: Felipe explains the whistle's beginnings

That whistle developed eventually into the whistle that I greet him with now.

The whistle is something everybody in the family understands, and we use it to call everyone - my wife, my brothers, my sister. Everybody in the family, when they hear the whistle, they know that we are calling each other.

So that is more or less the history.

We will keep going with the whistle all the way, and hopefully Carlos will keep going in developing his professional baseball career to the top - to his goal of being a superstar Major League baseball player.

This is our goal, so we stick behind him. Everything that I want to tell him, I will keep telling him with the whistle.

Felipe Peña 's diary appears as told to Kent Schacht, who is a editorial producer for MLB.com. This story was not subject to approval by Major League Baseball or its clubs.