Let me tell you that without reading the whole article I can tell you that they, the Mormons, changed the non black thing in 1978. Here is, in my proper opinion, the reason. Brigham Young University hoop and football is very important and when your primary athletes are LDS and blacks are the devil you limit yourself to only whites. Other schools were integrating or had integrated by the mid 1970s and, frankly, white boys don't play corner back well; only one NFLer, Jason Sehorn, has played the position in recent years and white guys are not the end all and be all in hoop either. So the Lord spoke through the president of the LDS in '78 and said "Mr. President, let us stop getting burned on long routes in football and in basketball let us have some one who can bring up the ball." And so it was.
The Lord works in mysterious ways.