The Baltimore Orioles are planning to activate third baseman Manny Machado on Tuesday, according to a report from FOX Sports' Ken Rosenthal.

Machado underwent knee surgery in October, and played nine innings in his Saturday rehab start.

The weather in Baltimore isn't looking good for Tuesday's contest against the visiting Pirates, so Machado's return could be delayed. The Baltimore-Washington corridor is expecting as much as five inches of rain in the area before the system moves out by Thursday.