Marshall University filed a lawsuit against Conference USA on Tuesday to speed up its move to the Sun Belt Conference, the Division I conference that the university plans to join by the summer.
The lawsuit was filed in response to Conference USA’s demand for arbitration in Dallas after Marshall announced last year that it would join the Sun Belt. The move makes Marshall the third school to join the conference amid months of shuffling among N.C.A.A. universities in an era of realignment that has shifted the college sports landscape.
Marshall is one of several N.