Philadelphia Phillies broadcaster Harry Kalas was taken to a hospital Monday after passing out in the broadcast booth before Monday's game against the Washington Nationals, team president David Montgomery said."I think it's serious," Montgomery said. "Our thoughts and prayers are obviously with Harry."The 73-year-old Kalas, known for his distinctive "Outta here!" call on home runs, was found by the Phillies director of broadcasting at about 12:30 p.m., Montgomery said.Kalas joined the Phillies in 1971.