On July 19, the Mountain Party (the West Virginia affiliate of the Green Party) held a state nominating convention and decided to enter a candidate in the U.S. Senate race. He is Bob Henry Baber. See this story for more detail.
That race will probably have five candidates on the ballot. The Libertarian nominee is John Buckley, a former Virginia state legislator. The Constitution Party is almost finished with its petition drive for its nominee, Phil Hudok.