Left-hander Felix Doubront, out with a left shoulder strain and on a rehab assignment with the Double-A Portland Sea Dogs, pitched four innings in a start for Portland on Thursday night. He threw 43 pitches, 31 for strikes.
"Just feeling comfortable with mechanics and arm speed," Doubront told the Portland Press Herald.
He added, "My shoulder is lot better. I wish I started my year the way I feel now."
First baseman Mike Napoli, on the disabled list with a sprained finger on his left hand, is scheduled to be activated Sunday.
Outfielder Shane Victorino, on the DL with a strained right hamstring, has begun to take batting practice and is doing some running, according to Farrell.