By C. Trent Rosecrans
Cardinals pitching coach Dave Duncan is taking a leave of absence, the team announced on Thursday.
"As far as how long he'll be gone, no one knows," general manager John Mozeliak told FoxSports.com.
Duncan, 66, is leaving the team to be with his wife, Jeanine, who underwent surgery to remove a brain tumor in August. Duncan missed more than a month of the season to be with his wife, but returned for the postseason. Bullpen coach Derek Lilliquist served as the pitching coach during Duncan's absence. However, the team has not named an interim replacement for Duncan.
The team's release said Mozeliak and new manager Mike Matheny will meet "in the near future to determine the team's course of action to fill Duncan's position during his absence."
Duncan is considered one of the best pitching coaches in baseball.