Gary Tuck has resigned as Boston Red Sox bullpen coach for personal reasons, WEEI.com reported.
Tuck, the only member of the previous coaching staff to remain from last season after former manager Bobby Valentine's departure, also was the team's catching instructor.
The 58-year-old Tuck also had taken a leave of absense last year, citing personal reasons.
"He felt it was time to retire," first-year Boston manager John Farrell said. "Talented guy. Will miss him."
Tuck joined the Red Sox in 2006 and worked for 10 major-league organizations during his career, including seven that reached the World Series.
Boston minor-league catching coordinator Chad Epperson was mentioned as a possible replacement for Tuck.