<page_title> List of American League pennant winners </page_title> <section_title> League Championship Series era (1969–present) </section_title> <table> <cell> 1988 <col_header> Series </col_header> </cell> <cell> Oakland AthleticsW <col_header> Winning team </col_header> </cell> <cell> Tony La Russa <col_header> Manager </col_header> </cell> <cell> 1989 <col_header> Series </col_header> </cell> <cell> Oakland AthleticsW <col_header> Winning team </col_header> </cell> <cell> Tony La Russa <col_header> Manager </col_header> </cell> <cell> 1990 <col_header> Series </col_header> </cell> <cell> Oakland AthleticsW <col_header> Winning team </col_header> </cell> <cell> Tony La Russa <col_header> Manager </col_header> </cell> </table>
La Russa led the Athletics to three consecutive American League championships from 1988 to 1990.