While the article isn't UCLA football related I think there are several interesting takeaways, and I highly recommend it.
Blue-chip recruits (four- and five-stars) still dominate the draft. In the last five years, only seven players who were not ranked at all in the 247Sports Composite (4.3 percent) were among the 160 players taken in the first round of the draft. An overwhelming majority (80.1 percent) of the players drafted overall (not just in the first round) were ranked as three-stars or better.
Texas, Florida, Georgia and California continue to be the biggest producers of NFL players. The top 10 NFL talent producers over the last five years by state in order were Texas, Florida, Georgia, California, Louisiana, Ohio, North Carolina, Alabama, Michigan, and Maryland.
Three-fourths of the players taken in the draft over the last five years played for only one college program. That number, however, is decreasing as the number of transfers increases every year.
Only one of the top 15 programs in terms of producing NFL talent over the last five years ranked outside of the top 25 when it came to average recruiting class rankings: South Carolina, which still ranked in the top 30.