The Phillies, however, are optimistic he will not need that much time on the DL this year.
"I think he's getting an epidural today, if he didn't get it already," Phillies general manager Ruben Amaro Jr. said Friday. "By the time he's supposed to come off we think he should be fairly close. We don't think it's a long-term thing. We'll see."
The Phillies selected infielder Kevin Frandsen's contract from Triple-A Lehigh Valley to take Polanco's place on the roster.