After watching several videos analyzing the Cowboys Saints game I have a contrarian view point.
First, Mazi was not as bad as it seemed. Mazi was taking on double teams and doing a decent job. In fact, Mazi got off the snap quicker in this game than I have seen him so far in is career, and when he does he is hard to handle. There is one play, a Kamara run outside, where Mazi gets into the guard so quickly he gets about 4 yards of penetration into the backfield. The guard literally tackles him to the ground. It should have been a holding call and run negated.
I am not saying he was great, but when he compare him to Jordan Phillips, it's night and day. Phillips gets shove 10 yards downfield by one guy, multiple times. He plays too high and gets no leverage. He is worse than useless.
Linval Joseph is slow, but he also holds his ground. I still think he needs to get in shape and he might make some plays for us.
Maybe the Saints are just that good at run blocking.