He certainly does not look like a 1st round pick, but for me the jury is still out. It look is to me like in Zimmer's defense, the DTs are there to occupy blockers and allow the LBs to be more active. It looked to me like Mazi was doing that pretty well on some plays. He still gets off a little to slow on some plays but other times he seems to be improved in that area. I want to see more of that.
Overall, I thought the Cowboys DL was unimpressive. Not much pass rush at all, against the Rams backups and scrubs. Remember, guys like Mazi, Carl Davis, and some of the other guys are going to be in the DT rotation.