ST. LOUIS — The St. Louis Cardinals have retooled their staff while Dave Duncan takes a leave of absence that could lead to his retirement, elevating Derek Lilliquist to pitching coach and Dyar Miller to bullpen coach.

Lilliquist filled in as pitching coach when the 66-year-old Duncan took a leave of absence last August to be with his wife, Jeanine, following surgery to remove a brain tumor. Duncan returned to the team in time for its run to a World Series championship but the Cardinals announced Thursday would be taking another leave related to his wife's recovery.

St. Louis did not say Friday whether Duncan planned on returning for a 17th season.