Lt. Frank Vanore, a police spokesman, says Commissioner Charles Ramsey reviewed the tape and felt the officer had acted within the department's guidelines, which allow officers to use Tasers to arrest fleeing suspects. Vanore says internal affairs is still investigating.
The fan, wearing a baseball cap, red T-shirt and khaki shorts, hopped a fence and scurried around the outfield at Citizens Bank Park, eluding two security officers in the bottom of the eighth inning against the St. Louis Cardinals.
One officer used a Taser and the fan went down in a heap (video).
Several Phillies placed gloves over their faces and appeared to be stifling laughter at the wild scene.
Fans applauded as the fan was escorted off the field.
Phillies spokeswomen Bonnie Clark said the police department is investigating the matter and discussing with the team whether using the stun gun was appropriate.
Police spokesman Lt. Frank Vanore told The Philadelphia Inquirer police internal affairs will open an investigation to determine if the firing "was proper use of the equipment."
Vanore was not made available to The Associated Press when a call was placed to the police department's public affairs office late Monday night.
The teams said it's the first time a Taser has been used by police to apprehend a spectator who ran onto the field.
The fan was a 17-year-old male and he will be charged with criminal trespass and related offenses, the team said. The Phillies did not release his name because he is a juvenile.
St. Louis won the game, 6-3.