Johnson going on rehab assignment

Marlins first baseman Nick Johnson, on the disabled list with a right hamstring strain, will be going on a rehab assignment for Class-A Jupiter on Tuesday.

The plan is for Johnson to play at least two games with the Hammerheads, and the first baseman may be able to join the Marlins as early as Friday at Washington.

Johnson tweaked his hamstring during the first game of a double-header with the Rockies on Aug. 16.