What good are 2-DL plays?

[Dean-Atlanta]

Typically the difference is either a DL (typically with 64 SP/91 ST) or a LB (often with 74 SP/81 ST). Why do some think there is an advantage to having ONE defenders wioth 10 points more SP and 10 less ST?

[Jerry-Redskins]

Puts more speed on the field and another pass defender for short passes. The PNFL has been a heavier passing league. The 2 DL plays clog up the short passing lanes and defend the outside runs
.

[Mitch-Oilers]

Jerry is right. However, delayed runs up the middle tend to do well against those defenses.

[Dean-Atlanta]

Puts more speed on the field and another pass defender for short passes. The PNFL has been a heavier passing league. The 2 DL plays clog up the short passing lanes and defend the outside runs
.

Does that remain true when the 2-DL plays have three men defending the LOS? Aside from the speed difference of the one player,, which remains true.

[Matt-Jacksonville]

Jerry is right. However, delayed runs up the middle tend to do well against those defenses.

That's a gamble that many would take as most don't run a draw on 3rd and 10. Also I think the SP would allow the defense to converge before the RB gets ten yards.

I've always seen them as a benefit to defend the pass by adding extra coverage guys. If you design the defense just right you can also gain some protection against outside runs.