After a disappointing 1990 season, Frey was active on the free agent market, acquiring former Toronto Blue Jay and American League MVP George Bell, former Cincinnati Reds starting pitcher Danny Jackson, and former Houston Astros closer Dave Smith. Jackson and Smith flopped in their roles in 1991, and Zimmer was fired – apparently on orders from Tribune Co. CEO Donald Grenesko, in May 1991. Jim Essian, a former journeyman catcher and Iowa Cubs manager, replaced Zimmer for the remainder of the season. Frey was reassigned within the organization after the 1991 season, replaced by former Chicago White Sox general manager Larry Himes.