Complex sentence: The only major missing from Dorin-Ballard's resume is the U.S. Women's Open, although she has made the semi-finals five times (2003,2007,2008,2009 and 2010) with runner-up finishes in the 2003 and 2009 events.
Split into simpler sentences: The only major missing from Dorin-Ballard's resume is the U.S. Women's Open. She was a semi-finalist in this tournament in 2003,2007,2008 and 2009, with runner-up finishes in the 2003 and 2009 events.