PORTLAND, Maine — Boston Red Sox left-handed pitcher Franklin Morales is scheduled to make a rehab appearance with the Portland Sea Dogs at 6 p.m. Wednesday when the Sea Dogs host the Reading Fightin Phils at Hadlock Field.

Morales has yet to appear in a major league game this season. He was placed on the disabled list with a lower back strain on March 31 (retroactive to March 22). He has made one rehab start with the Greenville Drive (Low-A) on April 17, where he tossed three shutout innings, allowing one hit and two walks while recording one strikeout.

The 27-year-old is in his third season with the Red Sox organization, where he has appeared in 73 games (nine starts) with a 4-5 record, a save, and a 3.73 ERA. Morales was signed by the Rockies in 2002 at the age of 16 and was acquired by the Red Sox on May 19, 2011.

He has a career major league record of 11-16 with a 4.36 ERA over six seasons with the Rockies and Red Sox.

Morales will be the fourth Red Sox player to rehab with the Sea Dogs this season. Shortstop Stephen Drew appeared in four games for the Sea Dogs April 4-8. John Lackey started for the Sea Dogs on April 22 and Craig Breslow pitched for the Sea Dogs on April 23.

Morales is the 30th player in franchise history to rehab with the Sea Dogs and 24th as a Red Sox affiliate.