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Pro Football Focus uses a complex system to analyze every NFL player involved in every snap in every game and assigns a grade based on how he performed on that play, with each position having its own set of grading guidelines. Plus/minus scores are given in 0.5 increments and a small normalization factor is applied to make 0.0 the average grade for a game or season. To learn more, visit www.profootballfocus.com.

Packers rookie cornerbacks Damarious Randall and Quinten Rollins have impressed quarterback Aaron Rodgers, who said they “have been doing a good job of making plays. They have good ball skills.”

Their numbers bear that out.

Randall, the Packers’ first-round draft pick, has earned a +3.4 overall grade on 289 defensive snaps and has lined up almost exclusively at left corner (91 percent of the time.) His +4.2 coverage grade is second on the team to Sam Shields’ +4.9.

Randall’s cover skills are reflected in his six passes defensed (plays in which he caused an incompletion by knocking the ball away, as he did on fourth-and-goal in the final seconds Sunday against the Chargers). Randall’s total ranks third among NFL cornerbacks.

Randall has allowed only a 79.5 NFL passer rating on throws targeting his coverage, which ranks 29th in the league (Carolina’s Josh Norman leads at 24.1, followed by Darrell Revis of the New York Jets at 32.8).

Randall has been particularly effective defending against go routes, allowing only two catches in 13 attempts for 59 yards.

Meanwhile, Rollins – the Packers’ second-round pick -- has a +1.2 overall grade on 49 defensive snaps and has lined up primarily at slot corner positions (80 percent of the time). While his two interceptions made all the highlight reels, he actually has graded out better in run defense (+2.0).  He has made five tackles, with no misses, and all five were defensive stops (solo tackles that resulted in offensive failure.

Both players have been active on special teams. Randall gets a +2.0 grade on his 32 snaps (three as the “gunner” on the punt coverage team, 26 as the “vice” on the punt return team blocking the opposing teams’ gunner). Rollins has a grade of +0.5 on his 79 snaps (17 as gunner, 12 as vice, 24 as an “edge” defender on the kickoff coverage unit).

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