While history was made , the Flyers quickly coughed up their lead .
As the second period began , all of Philadelphia was buzzing as a result of Roy Halladay 's first career perfect game -- the 20th in baseball history .
While history was made , the Philadelphia quickly coughed up Philadelphia 's lead .
As the second period began , all of Philadelphia was buzzing as a result of Roy Halladay 's first career perfect game -- the 20th in baseball history .