Falter was cleared Saturday to return from the COVID-19 injured list but will need a rehab assignment, Matt Breen of The Philadelphia Inquirer of reports.
Falter's most recent appearance was July 18, and before that July 10, so he needs a bit of minor-league work before rejoining the Phillies. It's unclear exactly when he'll be activated, but his rehab assignment doesn't figure to last more than a few games.