<page_title> Mark McGwire </page_title> <section_title> Records </section_title> <table> <cell> 245 <col_header> Record </col_header> <col_header> Major League Baseball records </col_header> </cell> <cell> 1996–1999 <col_header> Date(s) </col_header> <col_header> Major League Baseball records </col_header> </cell> </table>
Mark McGwire owned the highest four-season HR total, with 245 from 1996 to 1999.