The school's most prominent sports team is its men's lacrosse team, which has won 44 national titles - nine NCAA Division I (2007, 2005, 1987, 1985, 1984, 1980, 1979, 1978, 1974), 29 United States Intercollegiate Lacrosse Association (USILA), and six Intercollegiate Lacrosse Association (ILA) titles. Hopkins' lacrosse rivals include Princeton University, Syracuse University, the University of Virginia, and a budding rivalry with Duke University due to intense recent competition, including one-goal victories over the Blue Devils in both the 2005 and 2007 NCAA Championships and in the NCAA semifinals in the 2008; its primary intrastate rivals are Loyola University Maryland, Towson University, the United States Naval Academy, and the University of Maryland. The rivalry with Maryland is the most prominent in college lacrosse and the two teams have met 105 times. On June 3, 2013, it was announced that Johns Hopkins would be joining the Big Ten Conference as a Sport Affiliate member in Men's Lacrosse starting in 2015.