The Reds declined Maile's $3.5 million club option for 2025 on Friday.
Maile is out of the lineup for Monday's game against Atlanta.
The Reds activated Maile (back) from the 10-day injured list Friday.
Maile (back) was sent to Triple-A Louisville to begin a rehab assignment Tuesday.
Reds manager David Bell said Friday that he's hopeful that Maile (back) will be ready to return from the 10-day injured list shortly after the All-Star break, MLB.com reports.
Mailey was placed on the 10-day injured list Friday due to a herniated disc in his back.
Maile (hip) is absent from the starting nine Friday against Detroit.
Maile was removed from Thursday's game in the seventh inning after sustaining a side injury near his right hip, Mark Sheldon of MLB.com reports.
Maile isn't in the Reds' lineup for Saturday's game against the Cardinals.
Maile started at catcher and went 0-for-3 in Friday's 1-0 loss to the Cardinals.