He is slow off the snap, but I think giving up on him now is way too early. DTs take time to mature in most cases. Mazi was a late 1st round pick which means he is really a 2nd round talent. The expectations for him are ridiculous.
He has not done much as a rookie, but people claim he is some huge liability too. I don't see it either way. He is a rookie, just learning and he needs more time to develop. It should be noted that Hankins got hurt on the 1st series of the second half. Mazi came in after that and I didn't see the Eagles running it down our throats. I will watch the game again and focus on him, but my initial impression was he was average. I didn't see him getting shoved around, but didn't see him make any plays either. He had the same number of tackles as Hankins. 0.
Over the next few weeks we should get a much better look at him. Let's see how he does. But What we want to see is a big improvement next year. Even so, I am still happy the Cowboys at least took a shot at a DT early. If Mazi fails I fear it may be another 30 years before they draft another DT in the 1st round.