Team walks allowed per game is almost the same measure as team walks allowed per nine innings except it does not take into account actual innings pitched (which can differ based on weather-shortened or extra innings games).
More about Team Walks Allowed Per Game
Teams that play more extra innings than the average team may have a slightly higher team walks allowed per game than teams that play fewer than average extra innings. This statistic takes into account both intentional and unintentional walks and with the decline in offense in recent years has dropped significantly for the average team. In 2013 the average team allowed right around 3 walks per game; in 2009 the average team allowed 3.37 runs per game, which is a drop of around 12% in just four years.