Merryweather (hamstring) will begin a rehab assignment with the Twins' rookie-level Florida Complex League affiliate Tuesday, Theodore Tollefson of ZoneCoverage.com reports.
Merryweather has been shelved since spring training with a left hamstring strain, but he's finally ready for game action. The veteran reliever is signed to a minor-league contract with the Twins and will eventually move up to Triple-A St. Paul.