DWTS: Ty Murray Headed For His Last Ballroom Rodeo?

Ty Murray, a nine-time rodeo world champion rodeo, has hung onto some of the most aggressive bucking bulls in his path to cowboy greatness.

It will take, according to odds-makers, an even greater effort for Murray to keep his spot on the ballroom floor Monday on Dancing With The Stars -- the husband of Jewel is listed as a 50-to-1 underdog as the competition winds down to its final four.

Sex And The City stud Gilles Marini continues to lead the pack as a 2-to-3 favorite to prevail on the popular ABC show. Bachelor castoff Melissa Rycroft is still considered a formidable contender with even money odds for her to avenge her loss on the previous show with a ballroom title. And Shawn Johnson, the teen Olympic gold medalist, continues to hang in there as a 5-to-2 underdog.

See who thrives -- and who doesn't -- on tonight's episode of Dancing With The Stars, airing on ABC at 8/7c.