Starting with Wednesday's matinee against the Yankees, the Phillies will sport an Independence Blue Cross patch, making IBX the team's first jersey sponsor.
Independence Blue Cross is also a sponsor for the Flyers' home jerseys.
Per a Sports Business Journal report Tuesday, the Phillies are now the 22nd MLB team to have a jersey advertisement.
"IBX has been on my target (list) from the beginning," Phillies managing partner and CEO John Middleton said to the Sports Business Journal. "We're both long-standing Philadelphia institutions. … We're taking an existing relationship and putting it on a whole different platform."
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The Phillies announced the news Wednesday at Citizens Bank Park and with a video narrated by Mike Schmidt.