[enuttage]

Galveston Storm (still talked about MANY generations later as the deadliest hurricane in U.S. history).

Austin Senators (Senators and Black Senators are the first two pro teams from here) - Gotta play at Hornsby Bend Park (fictional), where Rogers Hornsby is still buried (real - at the actual Hornsby Bend). The two work together well, as that's MLK Blvd (FM 969), the Eastside, and a place rich with baseball tradition and black history (Wee Willie Wells, Joe Wood, Hilton Smith).

For what very little it's worth, 'round these parts, Austin (and to a lesser degree, SA) would not be considered 'South Texas'. Gotta put it somewhere, though.

Kingsville Ranchers - Still, I believe, the largest ranch in the country, King Ranch, and the 'real' start to American ranching.

I also *strongly* endorse jetking's following suggestions, especially Laredo, which is just plain brilliant. That name is THICK with history and culture in that place for hundreds of reasons.

Alice Ideals (famous Tejano record label in the city)
Brownsville Eagles (Eagle Bus Manufacturing was a big employer for a long time)
Eagle Pass Mavericks (name of the county)
Edna Railmen (railroad important to city's founding)
Laredo Cowboys ("As I walked out in the streets of Laredo...")
McAllen Royals (it's in Hidalgo County, Hidalgo is a corruption of the Spanish "Hijo de Algo" - son of someone, which was used for minor royalty & such)
Port Lavaca Whoopers
San Antonio Bears (it's a pun on Bexar, pronounced "Bear" more or less, which is the county in which San Antonio resides)