damn, you got me....71 yards in 6 games...he sucks. let's break that down:
Op A Yds Avg
SD 2 6 3.0
Min 0 0 0.0
Den 0 0 0.0
Sea 2 9 4.5
Ari 10 30 3.0
Chi 3 15 5.0
The problem has far more to do with the OC and the OL than the player. ZZ has actually produced better than AA and Bell, which is pretty impressive for a UDFA. Still, the biggest issue for every one of the RBs has been the OL and OC. The plays are not designed well and the OL is terrible at blocking.
ZZ was actually averaging the same or better than Riddick in the Chi game. Take away his longest gain of 7 yards and he was averaging 4.0, which is what Riddick averaged on his 7 carries with a long of 9. So to be even more fair, take away Riddick's long of 9 and he averaged 3.2.
I'm not sure what you are expecting of ZZ or any of the RBs. All of them are capable of getting yards provided the OC has a good scheme in place and the OL blocks well enough. That's true for pretty much every single RB in NFL history with the exceptions of Barry and Walter.
So it seems unless they are "the best ever", they are worthless trash who should be cut and the Lions are better off playing without a RB at all. Even AP and Emmitt Smith would produce similar numbers with the Lions because those guys need(ed) an OL that can open a hole and an OC who actually understands how to put in a quality scheme, not to mention they are the sole RB instead of a RB by committee system.
I absolutely do not understand the criticism you guys have of ZZ. The guy has shown he is capable of being an NFL RB. Will he be the best ever? No! Not one person has said that. But you don't need an RB to be the best ever to win a Super Bowl, you need an OL that can block and a quality coaching staff, but a solid RB is sufficient for winning and ZZ is solid.