Mountcastle went 3-for-5 with a double and a run scored in Friday's 7-2 win over the Twins.

Mountcastle isn't in Baltimore's lineup for Thursday's game against the Yankees.

The Orioles reinstated Mountcastle (wrist) from the 10-day injured list Tuesday.

Mountcastle (wrist) reported to Triple-A Norfolk to begin a rehab assignment Friday, Matt Weyrich of The Baltimore Sun reports.

Orioles GM Mike Elias said Tuesday that Mountcastle (wrist) is expected to begin a rehab assignment by the end of the week and could be back with the Orioles before the close of the regular season, Jacob Calvin Meyer of The Baltimore Sun reports.

Manager Brandon Hyde relayed Monday that he wasn't sure when Mountcastle (wrist) would return from the 10-day injured list, Jake Rill of MLB.com reports.

Mountcastle (wrist) hit off a tee Friday, Roch Kubatko of MASNSports.com reports.

Mountcastle (wrist) has yet to resume swinging a bat, Andy Kostka of TheBaltimoreBanner.com reports.

The Orioles placed Mountcastle on the 10-day injured list Monday with a sprained left wrist, Jacob Calvin Meyer of The Baltimore Sun reports.

Mountcastle (wrist) is out of the lineup for Sunday's game against the Astros, Roch Kubatko of MASNSports.com reports.