If Gregory's biggest problem is "might have narrow shoulders" than we're really looking for warts. So maybe he tops out at 250lbs, which is still enough weight, especially when you consider he's really 6'4.5" vice a legit 6'5". The real knock on Gregory should be one of work ethic, because he was known for being lazy in the weight room at Nebraska and getting by on pure athleticism, which is why he played as light as sub-220lbs last year. It very likely impacted his durability and hurt his production.