I believe that Stai bench pressed 225 lbs, 37 times at the 95 NFL combine, which was far better than the second place guy and I believe was a record at that time. By comparison, I believe Nick Gates benched 225 lbs a total 20 reps in 2016.
Stai was indeed a very strong guy back then- he was easily a 500 lb + bench press guy, and those are very rare even in the NFL. It's not rocket science why that crew was able to manhandle other teams so easily, they were all weight room guys who tested very well. Yes you have to be good technique-wise too, but there is no substitute for raw power at that position, and Stai/Wiegert/Wilks/Graham/Zatechka/etc. ALL had it. Lately 1 or 2 guys of the five "have" it and you can see the results. Hopefully Neb gets back to that with the new regime in place.