After going a season without a medical director, the Red Sox named Dr. Laurence Ronan to that post, the announcement coming Thursday night. Ronan was the team's head internist last season.
The Sox also named physical therapist Dan Dyrek as the coordinator of sports medicine service. He had been a consultant.
General manager Ben Cherington said the promotions were part of a restructuring that began a year ago. This was the final step.
"For all intents and purposes, the structure is in place," Cherington said. "Hopefully this will work for a long time."
As the Globe reported last week, head physical therapist Mike Reinold is not returning to that post. Massage therapist Mitsugi Funatsu also will not return.
The other members of the staff remain in their positions. Cherington said there could be one other position added.
The Red Sox had 24 players, 13 of them former All-Stars, go on the disabled list 34 times last season. They had 1,495 games missed because of injuries.
Since 1987, when records were first kept, no team in baseball used the disabled list more.