Phillies security director Sal DeAngelis says the team two years ago saw how terrorists were using vehicles to stage attacks.
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"We saw the security landscape both domestically and abroad was changing, and people were trying to use different ways of harming individuals at large public gatherings. And we noticed that we needed to shore up our security perimeter around the ballpark," DeAngelis said.
DeAngelis says other sports and entertainment venues have taken similar measures in recent years.
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"There are no threats to Citizens Bank Park at this time. But we're constantly monitoring what's going on in the country and in the world and feel that this is a necessary step for us," he added.
DeAngelis says the bollards, which are about three feet high and 10 inches in diameter, will be painted burgundy to match the ballpark structure, and landscaping and more trees will accompany the extra security.
He would not discuss the cost of the project, but says no public money is involved.