Marshall is moving to the Sun Belt Conference, becoming the ninth school to reveal plans to depart the dwindling Conference USA. Marshall Athletics posted the news on its Twitter account Friday. The school that has been a member of C-USA since 2005. Earlier this week the Sun Belt announced C-USA schools Southern Mississippi and Old Dominion would be joining the conference by 2023. The additions will give the Sun Belt 13 football-playing members. Conference USA currently has only five members — UTEP, Louisiana Tech, Middle Tennessee State, Florida International and Western Kentucky — committed to the league long-term.