Western Kentucky is leaving the Sun Belt to join Conference USA in 2014, a source told ESPN's Brett McMurphy on Saturday.
An official announcement is expected Monday.
Last week, ESPN reported Tulsa would leave C-USA for the soon-to-be-renamed Big East. That move is expected to be announced as early as Tuesday.
Tulsa and Western Kentucky will join their new conferences on July 1, 2014. Tulsa's move will give the soon-to-be-renamed Big East 11 members with Navy joining in 2015 as its 12th member.
The Hilltoppers will replace Tulsa and brings C-USA's membership back to 14 schools.
The leading expansion candidates for the Sun Belt to replace Western Kentucky are James Madison and Liberty, sources said.