@caveman99 Not quite. It's how often opponents run it compared to what they normally do (X-axis), versus how successful they are at running compared to what they normally are (Y-axis). Bottom left quadrant means that opponents have run the ball against us less often than they usually do, and when they do run it against us, they are less successful at it than they usually are .
So yeah, we've been pretty solid at run defense, despite only being a 3-3 up front (instead of 3-4 or 4-3).