Bench coach Chris Speier had filled in for Berry during the first 98 games of the season.
"I told him, 'Hey man, where have you been all this time?" Reds manager Dusty Baker, a prostate cancer survivor, said jokingly after Cincinnati put 11 runs on the board Monday. "We're glad to have him back."
Berry is in his 30th season in the Reds organization as a player, coach or manager, and he is in his 15th consecutive season on the big league coaching staff. The longest-tenured member of the staff, he has spent the past 10 seasons as the club's third-base coach.