The Brownsville Charros, Corpus Christi Aces, Del Rio Cowboys, Laredo Apaches and McAllen Giants joined Donna in beginning league play on April 27, 1949.
The team placed sixth, playing the season under managers Russell Frisch, Charlie Engle and Mimi Cavazos.
[3] Donna/Robstown finished behind Corpus Christi (89–51), the Laredo Apaches (80–60), Brownsville Charros (75–65), McAllen Giants (70–68) and Del Rio Cowboys (58–80) in the standings.
[4][5][6] Continuing play, Robstown hired Fabian Kowalik as manager in 1950, luring him out of retirement from operating a successful beer distributorship.
[12] The 1949 and 1950 Robstown teams hosted minor league home games at the Sun Sport Ball Park.