As the San Francisco Giants get set to host the St. Louis Cardinals in Game 3 of the NLCS today (weather pending!) we can be reasonably assured that AT&T Park’s wireless networks will be able to handle whatever load the fans throw at them. According to AT&T, the park’s DAS and Wi-Fi networks carried an average of 1.24 Terabytes of traffic for the two most recent postseason contests, the NLDS games against the Washington Nationals on Oct. 6-7.

According to a recent AT&T local blog post, the DAS network at AT&T Park carried an average of 314 GB of traffic between the two games, with a high of 338 GB on the Oct. 7 game. Remember, these stats only reflect traffic of AT&T customers at the park — the actual total of DAS traffic would include usage from customers of Verizon Wireless, T-Mobile and Sprint, but none of those companies have (ever) reported DAS traffic usage. Still, the AT&T number is pretty impressive all by itself.

On the Wi-Fi side, AT&T said there was an average of 926 GB of data used per game — again, impressive when you consider that AT&T Park is a baseball stadium that only seats about 41,500 folks when it’s sold out. Since the Wi-Fi network is free and open to any wireless service customer, the 926 GB number reflects total data use. Combining the two gives you a figure of 1.24 TB average traffic per game. Now let’s see if Giants fans top that number this week.

UPDATE: We just got some fresh stats from AT&T for Tuesday night’s NLCS game at AT&T Park, and no surprise, more data was consumed. According to AT&T the fans at the Oct. 14 afternoon game used 1.38 TB of total data, with 1,067 GB on Wi-Fi and another 318 GB on the cellular DAS (remember those stats are AT&T customers only on the DAS). We’ll do another roundup after the three games are played this week to get averages.