Not arguing but I am curious if the defensive efficiency ratings take into consideration who you are guarding? When we say that Smith has the worst defensive rating but he is frequently being asked to guard the other teams leading scorer how does that affect the ratings? Do they take in the players season average and then adjust the score to effectively show if the player was below or above what they normally do when assigning the defensive rating or are they just based on straight numbers?
If it's anything like the NBA, defensive efficiency is extremely tough to truly calculate compared of offensive efficiency.
My understanding, and I'm not an expert in the least, is that it can only measure stats so if you steal the ball, block the ball or rebound the ball you're going to have pretty good efficiency numbers (makes sense). However I believe it can't distinguish how you are getting your steals. For example are you just over aggressive and hunt steals, therefore driving your efficiency up?
I've seen both explained. Some say it's just a calculation of steals, blocks and rebounds per minute and others say there is an attempt to get a field goal rate (which is extremely tough because unlike offense where YOU are shooting, on defense you're constantly switching).
I personally play NBA dfs and defensive efficiency numbers have never been as reliable to me vs a simple percent of average (not pts per position, what percent on average does an individual score when playing you).
A good example is Rudy Gobert. He's constantly at the top of all defensive efficiency ratings by a large amount. He's a really interesting guy to attack in daily fantasy because it's uncanny how many guys exceed expectations against him even though his steals, rebounds and blocks (and pace) are all working for him.
I just quickly checked that Capella had around 46 fantasy points against Gobert in 36 minutes last night.
A better example is probably Cliff Moore. I'm assuming that his defensive efficiency rate is really good because his rebound rate and block rate is otherworldly. However he can't see the floor supposedly because of his defense. As you saw vs Penn State, he had some great help blocks and rebounded really well...but also blew some plays on defense that made you go, ehh I'm not sure he's quite ready yet.
Anyway, my point is I'm curious to because I believe it's really difficult to get a reliable individual defensive stat.