What about lacross or wrestling? Wrestling could benifit the football program. Wrestling could be for womens and men.
Wrestling is a popular winter sport in the northern states: something to do during the winter when it's below zero outside, when it's not football season. The state of Iowa is a powerhouse, with the U of Iowa, Iowa St., and Northern Iowa frequently in the top ten, and they are successful particularly because wrestling is very popular at the high school level (again, winter sport in a northern state), so they have a substantial talent pool to recruit from.
I don't perceive that competitive wrestling is popular in El Paso at all, high school or otherwise, and I don't think they would ever attract the talent or have the fan support to even approach the success at the northern schools where it's actually popular.
The southern schools are traditionally better baseball schools than the northern schools, and if there's one thing CUSA is actually good for right now it's baseball. If UTEP were to add a men's sport, it really needs to be baseball to take advantage of that. I could also see men's soccer (I mean, if people want MLS in El Paso, such a soccer town we are, we should be able to support a team at UTEP, right?).
UTEP offers and has great tradition in track & field, which most schools don't offer. That's the tradeoff we've made in not having some teams that other schools have, like baseball. And I think it's the right call, given our tradition.