Because they lacked a perimeter threat, the coaches operated a four-hole running attack, meaning the large majority of the runs came between the tackles. In fact, only 67 runs came outside the tackles. Most of the plays were simply up the gut; they led the league in runs up the middle.
Here's a breakdown of the Jets' run direction, according to NFL stats:
Plays: 37 (Rank: 27). Avg. gain: 4.22 (Rank: 27)
Plays: 47 (Rank: 24). Avg. gain: 3.53 (Rank: 24)
Plays: 43 (Rank: 20). Avg. gain: 3.42 (Rank: 24)
Plays: 212 (Rank: 1). Avg. gain: 3.65 (Rank: 25)
Plays: 45 (Rank: 17). Avg. gain: 3.64 (Rank: 22)
Plays: 69 (Rank: 5). Avg. gain: 4.48 (Rank: 9)
Plays: 30 (Rank: 27). Avg. gain: 6.03 (Rank: 12)
Pathetic. Big reason why Sparano was fired and why we need a new starting RB, Greene doesn't threaten the perimeter.