I'm not holding LJ's 2 great years against him. Those 2yrs were amongst the best ever statistically but all the poundage he took those 2years caught up with him. I can't remember the stat but it's something along the lines of if a RB gets close to or over 400 carries they get hurt at an alarming rate the next yr. I think his elite HB days are done.
LJ's peak was around 26 which is the same age Steven is right now. I guess this year will be the true measure of how good S-Jax is(I think you mentioned this too). SJ already had one yr where his #s were close to LJ's during his peak ('06) but he still has a few more years to go before he hits that running back wall (30yrs old)
IMO he's in that next tier of HBs (6-10). I'm talking about right now, not career-wise. Career wise he's more accomplished than all of the guys I mentioned.
And he isn't as explosive as any of those guys I mentioned. Look at his longest rush from the last 3 yrs (38). He has exactly 3 runs over 40yds (none in the last 3yrs). You compare this to his yrs in Denver where he had 3 his rookie yr and 6 the next it's a no brainer to say he's not as explosive any more. I posted some reasons why he's not as explosive (all legit in my eyes btw) but look at the breakdown of the 5 HBs I chose:
Last 3 yrs
Steven Jackson - 6 rushes over 40yds - 23 over 20yds
Deangelo Williams - 6 over 40 - 25 over 20yds
AD(P) - 9 over 40 - 31 over 20yds
Michael Turner - 5 over 40 - 20 over 20yds
Westbrook - 1 over 40 - 24 over 20yds
CP - 0 over 40yds - 19 over 20yds
Not only do his stats show that he's not that explosive anymore but anyone watching him knows that he doesn't run the same. He doesn't have the same balance, burst, open field elusiveness, and top-end speed.
He's 5'11 - 221lbs now
When he came into the league he was 204 (after he gained weight for the combine) and ran a 4.42.
He's not the homerun threat he used to be and when he reaches that 2nd line of the defense he doesn't break away anymore.