What a terribly sad way to kick off this year’s Nationals home opener: longtime Philadelphia Philies broadcaster Harry Kalas — known for his signature “that ball is outta here!” home run call and soothing baritone — collapsed around noon inside the press box at Nationals Park. He was transported to George Washington University Medical Center, where, at 1:20 p.m., he was pronounced dead, according to a Philly.com report. Kalas, who had been the voice of the Phillies for 38 years, was 73. There’s no word yet on a cause of death. Today’s game is still scheduled to be played, but the Phillies have canceled tomorrow’s planned outing to the White House. Fans at the game tell us that Kalas’ death was announced and they were asked to rise and observe a moment of silence.