Complex sentence: He pitched for the St. Louis Cardinals from 1983 to 1988, the Philadelphia Phillies from 1991 to 1992, the Pittsburgh Pirates in 1992, and then the Toronto Blue Jays from 1993 to 1995, when he retired.
Split into simpler sentences: He pitched for the St. Louis Cardinals from 1983 to 1988. He then signed with the Toronto Blue Jays from 1993 to 1995, then he retired.