Published Sep 16, 2018
Pro Football Focus Grades: Defense
Tom Kakert  •  Hawkeye Beacon
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The Iowa defense was dominant for the third straight game. The Hawkeyes limited the Panthers to just 228 yards of total offense and only 6 net rushing yards on their way to a 38-14 victory. The points scored by Northern Iowa were late in the fourth quarter when the outcome of the game was clearly decided.

The Hawkeyes also added to their sack total with three more QB sacks. That brings their season total to 12 on the year. Iowa also had one interception and forced a fumble that resulted in a turnover.

We take a look at how the folks at Pro Football Focus graded the Iowa defense this week.

If you are wondering how Pro Football Focus arrives at their grades, here's a rundown:

On every play, a PFF analyst will grade each player on a scale of -2 to +2 according to what he did on the play.

At one end of the scale you have a catastrophic game-ending interception or pick-six from a quarterback, and at the other a perfect deep bomb into a tight window in a critical game situation, with the middle of that scale being 0-graded, or ‘expected’ plays that are neither positive nor negative.

Each game is also graded by a second PFF analyst independent of the first, and those grades are compared by a third, Senior Analyst, who rules on any differences between the two. These grades are verified by the Pro Coach Network, a group of former and current NFL coaches with over 700 combined years of NFL coaching experience, to get them as accurate as they can be.

From there, the grades are normalized to better account for game situation; this ranges from where a player lined up to the dropback depth of the quarterback or the length of time he had the ball in his hand and everything in between. They are finally converted to a 0-100 scale and appear in our Player Grades Tool.

Season-level grades aren’t simply an average of every game-grade a player compiles over a season, but rather factor in the duration at which a player performed at that level. Achieving a grade of 90.0 in a game once is impressive, doing it (12) times in a row is more impressive.

It is entirely possible that a player will have a season grade higher than any individual single-game grade he achieved, because playing well for an extended period of time is harder to do than for a short period, Similarly, playing badly for a long time is a greater problem than playing badly once, so the grade can also be compounded negatively.

Each week, grades are subject to change while we run through our extensive review process including All-22 tape runs and coaching audit, so you may notice discrepancies among grades published in earlier articles compared with those in the Player Grades tool until grade lock each week.

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DEFENSIVE LINE

Iowa once again stuck with their rotation up front with with eight players playing 16 snaps or more in the contest. Interesting to note that starters Parker Hesse only played 16 snaps and Sam Brincks only 18 snaps. Also, Anthony Nelson only had 21 snaps against the Panthers.

DL GRADES
SNAP COUNTRUN GRADEPASS RUSH GRADEOVERALL GRADE

Brady Reiff

22

70.3

75.5

81.4

Cedrick Lattimore

34

76.7

65.9

76.3

A.J. Epenesa

48

73.3

62.8

70.1

Parker Hesse

16

76.1

53.6

70.0

Matt Nelson

31

65.4

63.4

67.0

Anthony Nelson

21

65.9

61.4

65.9

Brandon Simon

4

N/A

64.9

65.7

Chauncey Golston

42

65.9

60.5

59.7

Sam Brincks

18

65.4

53.9

59.5

Garret Jansen

4

N/A

56.8

56.8

Jack Kallenberger

4

N/A

56.0

55.8

LINEBACKER

The Hawkeyes changed their starting lineup at linebacker this week with Kristian Welch, who missed last weeks game, moving back in as a starter and Djimon Colbert back to a reserve. Overall, a strong game for middle linebacker Jack Hockaday, who continues to improve each week.

LB GRADES
SNAP COUNTRUN GRADECOVERAGE GRADEOVERALL GRADE

Jack Hockaday

53

83.4

71.6

71.7

Kristian Welch

35

59.8

68.1

67.3

Amani Jones

8

60.0

63.0

64.3

Nick Niemann

57

62.9

61.0

59.6

Barrington Wade

4

N/A

60.7

59.6

Djimon Colbert

26

63.6

50.5

51.5

DEFENSIVE BACKS

In the defensive backfield, Michael Ojemudia had a strong game with his first interception of the season and five tackles. Matt Hankins was also very good with six tackles. Amani Hooker was quite with just two tackles, but he did break-up one pass and Jake Gervase has four stops and forced a fumble.

DB GRADES
SNAP COUNTRUN GRADECOVERAGE GRADEOVERALL GRADE

Michael Ojemudia

57

76.6

66.2

69.4

Jake Gervase

51

64.6

67.0

67.6

Amani Hooker

51

62.8

67.0

67.1

Riley Moss

4

N/A

64.3

65.0

Geno Stone

10

N/A

64.4

64.5

Julius Brents

4

N/A

62.7

63.2

Kaevon Merriweather

4

N/A

62.3

62.2

Matt Hankins

57

70.3

59.5

61.5

John Milani

6

N/A

54.9

54.8