the problem with projecting bush is he is a listed 6'3" 250...
how many RBs have ever starred at that position with that kind of stature?
chrsitian okoye (i don't have his exact height & weight, but clearly he was a big dude) comes to mind, but he was a freak of nature that was the nigerian national champ in 100 (yards or meters?) AND the shot put!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
thats the kind of freaky deaky you don't want to freak out with...

and even with all his physical prowess, his career was over about as quickly or more so than earl campbell, because he was so tall it hard for him to get low, he ran upright and took some HELLACIOUS killshots to the body (i remember some... it hurts just thinking about it)...
bettis was about 250 at end of his career, but i think he was closer to 230 when his career started... he had a pudgy, softer body than ronnie brown, but he had a low center of gravity and was a bowling ball, and he had crazy leg strength, tremendous contact balance, and underrated & deceptive feet quickness, shiftiness and make-you-miss ability in the hole (as did emmit smith)... probably best feet i ever saw for a guy that big...
if jacobs makes it as feature RB, he will break the trend, but it is precisely questions like those above (EBF really harped on this last draft in regards to jacobs, & he made some compelling points... historically, RBs that tall & big that have succeeded as feature RBs in the NFL ARE rare), that make jacobs a question mark until he proves it... and even then, he has to prove it over time... will he be able to withstand 20 carries a game if he runs high and absorbs the kind of punishment he will with that kind of workload, given his running style...