San Antonio could support an NFL team bettr than a baseball team. In Baseball, there are 162 games (81 home games)per season compared to basketball's 82 games (41 home games), and to football's 16 games (8 home games).
In my opinion, San Antonio could better "support" 8 games compared to 81. Also, I believe San Antonio to be passionate for football, which cannot be said for baseball.
I am biased towards a baseball team in SA, because I do not follow it. The only reason, I go to a baseball game is to drink beer, eat a hot dog, and talk to friends. Baseball is the by product.