Logic says pass protection would be the biggest problem when Seattle goes to its four-receiver offense (1, 2). It definitely is a concern and a priority given that a four-receiver set leaves no more than six pass protectors (five OL and possibly a RB or TE). Would you believe that Seattle has allowed only two of its 42 sacks from its four-receiver offense this season? It's true.
To review, the Seahawks have used four personnel groupings for more than 93 percent of their offensive plays this season (not counting kneeldowns and plays when the QB spiked the ball to stop the clock). The team has allowed 42 sacks, all of them from these four main groupings (27 Hasselbeck, 14 Wallace, 1 Branch). Below we break down each group to see which ones allow the highest rate of sacks.
Zebra (1RB,3WR,1TE) ... 14.9% of these pass plays (15 of 101) resulted in sacks. Two of 101 resulted in interceptions. This has been the group featuring Nate Burleson and Jerramy Stevens.
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E (2RB,3WR) ... 9.6% of these pass plays (13 of 135) resulted in sacks (nine of them on third down). Five of 135 (3.7%) resulted in interceptions. This has been the group featuring D.J. Hackett.
Regular (2RB,2WR,1TE) ... 8.2% of these pass plays (12 of 146) resulted in sacks. Six of 146 (4.1%) resulted in interceptions.
Eagle (4WR, plus one RB or one TE) ... 2.8% of these pass plays (2 of 72) resulted in sacks. Six of 72 (8.3%) resulted in interceptions. That is the highest rate of interceptions for any group. Three of the interceptions were on third down.
Third-down situations can skew sack numbers. Third-down pass plays by personnel group: Eagle 40, Zebra 36, E 34, Regular 17.