Interesting, this was a week ago.
https://www.profootballfocus.com/blog/2015/10/28/top-10-nfl-secondaries-this-season/
Top 10 NFL Secondaries
4. St. Louis Rams
Cornerbacks: Janoris Jenkins (85.9), Trumaine Johnson (82.8), Lamarcus Joyner (74.9)
Safeties: T.J. McDonald (80.5), Rodney McLeod (76.8)
The youth movement that began for the Rams with the Robert Griffin III trade is now producing in a big way. All five of the above players are only in their fourth season or less, with an average age of 25—and they’re progressively getting better.
Janoris Jenkins, the veteran among the group, is PFF’s eighth-ranked cornerback, McDonald is No. 2 among safeties in overall run stop percentage, and Rodney McLeod has only allowed four receptions for 14 yards when he is in primary coverage, good for the fourth fewest yards allowed among safeties. In addition, 2014 second-round pick Joyner has five total QB pressures, including two sacks, from his slot cornerback position.
Average standard NFL QB rating allowed: 99.6
Interceptions: 4
Standout stat(s): Slot CB Lamarcus Joyner would be tied for the team lead in sacks (two) for the Atlanta Falcons.
6. Minnesota Vikings
Cornerbacks: Captain Munnerlyn (85.6), Terrance Newman (78.1), Xavier Rhodes (34.1)
Safeties: Harrison Smith (97.5), Andrew Sendejo (46.5)
The Vikings are led by PFF’s top-graded safety, Harrison Smith. Smith has missed only one tackle this season (the unit as a whole only missed 10 tackles), while also only allowing two receptions for 16 yards in primary coverage for an NFL QB rating of 0.0 (yes, you read that correctly). Working out of the slot, Munnerlyn is currently the
No. 12 cornerback, and has yet to allow a touchdown in his coverage. After an up and down 2014 with Cincinnati, 37-year-old Terrance Newman is turning back the clock and producing as well, only allowing an NFL QB rating of 72.9. Like Jim Harbaugh, we won’t play the “what if” game with Xavier Rhodes, who has struggled in his third season after taking a big step forward last year.
Average standard NFL QB rating allowed: 71.6
Interceptions: 8
Standout stat(s): This group has allowed only four touchdowns in their primary coverage—all by Xavier Rhodes.
Personally, these stats mean squat to me, but since they were mentioned.