To me, if you're only going to look at 1 metric, it's yards per play allowed. I ran the numbers for the past 3 years combined. A couple caveats:
1. Obviously, this is not all equal, because teams play totally different schedules. At least in the NFL, there's some commonality. But if you compare Miami vs say someone like Colorado, they don't have a single common opponent. So this isn't the end all measuring stick. But it's the best we can do
2. I only looked at games vs FBS teams. I have zero interest in how teams perform in the 4th quarter against Prairie View. FBS only
3. This is how the defenses are ranked if you combine all plays against FBS teams:
1. ALABAMA 4.35
2. LSU 4.39
3. MICHIGAN 4.43
4. CLEMSON 4.48
5. WASHINGTON 4.67
6. MIAMI 4.73
That's it. There's only 5 teams in the whole country who have averaged giving up less yards per play than Manny has since he arrived. Considering what we watched when turkey **** was coordinating this defense, I don't think any of us can say much about the job Manny has done at Miami.