No Arenaball team. Austin has one.
No Triple-A baseball team. Austin (well, Round Rock) has one.
No D-1 football team. Well, Austin certainly has one of those.
Hockey? OK, but that's like 4,000 fans a game...but still, more than three times what UTSA basketball averages at home.
There's as many undergrads at UTSA as Tech. Or Texas State, for that matter. And more than OU has enrolled.
And yet no football team, despite being in a huge town that hosts a bowl game and a HS All-American game. Obviously there's room for a team just based on the sheer enrollment and citywide population, but there's some sort of huge sports apathy in San Antonio toward any team besides the Spurs. Of course, SA has enough Dallas in her to out and show up en masse to hosted championship-caliber sporting events, but supporting any other team just doesn't happen there.
I believe that the lack of support for anything behind one of the most successful NBA franchises in history is part of the reason the NFL hasn't made its way there yet. You can scream and cuss about only wanting to support a winner, but there's 30 other cities all with NFL teams that want that every year. The Houston Texans are 24-56 in their five years in the NFL. There's no way San Antonio is selling out an 80K stadium with a 2-7 home team facing a 3-6 opponent. Even when the only other game in town is the NBA.
D-1's a harder sell. They won't be able to beat the Aggies or the Longhorns of the world, and nobody cares about a gritty win over Northwestern State when people can watch either A&M or Texas play major college ball in HD on their couches.