The 47-year-old Lovullo, who managed with the Red Sox at Triple-A Pawtucket in 2010, had joined Farrell in Toronto as his first-base coach when Farrell took the managerial job there.
Farrell and Lovullo became teammates with the Cleveland Indians in 1993 and later worked together as the organization's farm director and Triple-A manager, respectively. Their relationship and baseball interactions are what made this an easy decision for Farrell.
"It makes this a very comfortable and natural relationship, which I think will be important in that dugout," Farrell said.
"Torey's track record as a staff member and as a (minor league) manager, he has the ability to stand alone in his own right," he continued. "There are three things that quickly jump out to me: That's the knowledge of the game that he has and that comes from his playing and coaching and managing experience. It became even more (clear) over the last two years working in Toronto that his ability to communicate with players is a strong one.
"And what fits most well in this role as bench coach is the decision-making that he has in terms of a non-game setting, but also an in-game setting which is critical for this position."
Gary Tuck may also be returning as bullpen coach.
The Red Sox are also hoping bullpen coach Gary Tuck will return to that role next season, a source said. Tuck has an option year in his contract for 2013 and had said he would return "if the situation is good for me."
Tuck and Farrell enjoyed a close relationship when Farrell was pitching coach in Boston, but Tuck is also dealing with an illness in his family, so that could be a factor in his decision as well.