So, inspired by this, I started a spreadsheet with these numbers for all starting (or RBBC) backs. I didn't have a chance to get data for everyone, but looking at 21 of the 37 I put on the list, we're looking at an average of 4.439 and a median of 4.45. Edge was 4.38 when he came in and obviously he's not that now, but justinteresting to see the distribution.One thing that jumped out to me... obviously Chris Johnson is by far the fastest - the next fastest so far is McFadden. Assuming their 10 yr scores are taken from the scouting times, however, there's a stark difference on acceleration - i.e., what % of the 40 time is spent in the first 10 yards. (I didn't have shuttle or cone times for everyone, but obviously those are relevant here too). McFadden's 10 yard dash is 1.5 secs - which is closer to what many of the RBs who ran 4.45-4.48 ran. Among the best in getting to full speed is Chris Johnson (bested only by Jonathan Stewart)... and Forte is up there as well. (Don't have 10 yd breakouts for Bush so I would guess he's up there too).I'll try to finish this up when I get a chance sometime.