Former Orioles starter Kevin Millwood has left Boston's Class AAA team, according to CSNNE.com.
Millwood, who had hoped to get another shot in the majors this season, was 5-1 with a 4.28 ERA in 13 starts for Pawtucket.
The 36-year-old was 4-16 with the Orioles in 2010, his only season in Baltimore. He had a 5.10 ERA in 31 starts for the Birds.
Millwood signed with the Yankees organization in March but opted out of his minor-league deal in May and signed with the Red Sox.
He is 159-137 with a 4.11 ERA in his 14-year career.