Steve Sailer is at it again over on his website. He posts an graphic showing how bad black Qb's have been compared to White ones. Then he screws it all up by wondering what the white man has been doing to hold the black man down. Graphic is from the Deadspin website (which could also be called "screw the white athlete" website).
http://isteve.blogspot.com/2014/02/why-so-few-above-average-black-qbs.html
Here's a graph from a gigantic Deadspin compilation on the subject of black NFL quarterbacks. It's of the distribution of quarterback seasons by yards per pass attempt (which is probably the single best traditional statistic for assessing passing performance) versus that season's league average. White quarterbacks are distributed in a bell curve, while there are a lot of fair to middling black quarterbacks, but a clear shortage of ones more than 5% better than the league.
http://isteve.blogspot.com/2014/02/why-so-few-above-average-black-qbs.html
Here's a graph from a gigantic Deadspin compilation on the subject of black NFL quarterbacks. It's of the distribution of quarterback seasons by yards per pass attempt (which is probably the single best traditional statistic for assessing passing performance) versus that season's league average. White quarterbacks are distributed in a bell curve, while there are a lot of fair to middling black quarterbacks, but a clear shortage of ones more than 5% better than the league.