Obama, wearing a white business shirt and khakis, waved to the crowd as he walked alongside Castro, wearing a blue jacket and black open-collar shirt and receiving "Raul! Raul! Raul!" chants -- the first time two presidents of the two baseball-loving nations have sat together for a ballgame.
Youth was the theme as the ceremonies began, as young dancers with hoops and flags took the field, and fans with bandanas in a section of the stands made red, white and blue patterns in rhythm to the music.
Meanwhile, President Obama embraced Rachel Robinson, widow of the great Jackie Robinson, and he introduced her to first lady Michelle Obama and to Castro.