In 2010, the league added Air Force, Bellarmine, Denver, Ohio State and Quinnipiac, replacing Georgetown, Rutgers and St. John's, who left for the original Big East Conference, and Massachusetts and Penn State, who left for the Colonial Athletic Association.

In 2011, the ECAC added the University of Michigan Wolverines who were making their move from club level to NCAA Division I.

They became full members in 2013, the same year in which Loyola's lacrosse team joined the rest of the school's sports in the Patriot League.

On July 1, Hobart announced it would join the Northeast Conference beginning immediately for the 2014 season.

[3] The final ECAC member, Air Force, spent the 2015 season playing as an independent before joining Bellarmine as an affiliate in the SoCon in 2016, and later following them to the ASUN in 2022.