Well you can make the case that all the LB's are not getting it done so far.
Haggans and Foote both have 3 sacks. But have played two more games then Joey Porter.
James Farrior has 1 sack.
Joey has two in 4 games.
Haggans, Porter and Farrior all have 1 INT.
Yes Joey Porter needs to step it up. But to single him out among the LB's doesn't make to much sense.