John Farrell, who has been battling Stage 1 Lymphoma, will return as manager of the Boston Red Sox in 2016.

Red Sox president of baseball operations David Dombrowski made the announcement Sunday about the coaching staff and the 53-year-old Farrell, who has been on medical leave since Aug. 14 after being diagnosed. Farrell completed chemotherapy treatments in Boston this past week, and still has more tests in the coming weeks.

Torey Lovullo, who has been the interim manager during Farrell’s absence, also will return. Lovullo, 50, signed a two-year extension through 2017 to return to his regular role as bench coach.

The Red Sox said Lovullo, who had a 28-19 record as the interim manager, waived the right to pursue any major league managerial opportunities in the 2015-16 season.

Farrell guided the Red Sox to the 2013 World Series title and has a 246-243 record in his three seasons. The Red Sox signed Farrell to a two-year extension in February through the 2017 season, and the team holds an option for the 2018 season.

Third base coach Brian Butterfield, hitting coach Chili Davis, assistant hitting coach Victor Rodriguez and pitching coach Carl Willis will all be retained by the Red Sox. Dana LeVangie, who moved into the role of interim bench coach in August, also will be retained and move back to his role as bullpen coach.

The contracts of first base coach Arnie Beyeler and strength and conditioning coach Pat Sandora have not been renewed, the team announced.

Interim bullpen coach Bob Kipper will return to his duties as pitching coach for Triple-A Pawtucket next season.