Eflin was placed on the 10-day disabled list with a blister on his right middle finger, Matt Breen of The Philadelphia Inquirer reports.
Eflin had been scheduled to start Sunday against the Marlins, but Enyel De Los Santos will start in his place. Eflin is not expected to miss much time and could be eligible to start July 24 against the Dodgers, meaning he'd end up missing just a single start.