Awasome 1999 Al Home Run Leaders References. Yearly league leaders for home runs | baseball almanac. Mark mcgwirelaunched the most home runs in 1999, with 65 homers.

Mark mcgwire, 70, 1998 3. Mark mcgwire, 65, 1999 5. 161 rows yearly league hr leaders:1.barry bonds/73/2001/664, 2.mark mcgwire/70/1998/681, 3.sammy sosa/66/1998/722, 4.mark mcgwire/65/1999/661, 5.sammy sosa/64/2001/711,.