Larry Brown was a 12th rounder, the draft was 12 rounds at that time.
BTW the draft value chart that Jimmy Johnson came up with (along with Jerry, no one wants to ever credit Jerry) is way outdated for two reasons.
#1 at the time it was based on what draft picks had been valued at given the previous drafts trade results. Since no team truely disected it like the JJ's did there were alot of value positions that had not been discovered. This means that since everyone knows about it now, it's not as beneficial or even accurate since the data used now doesn't match the data used then.
#2 And vastly more important is the salary structure of rookies now. Back when the JJ's used the chart there were no guaranteed contracts so the higher you drafted the better. Recent hypothesis' is that drafting in the top 5 is many times counterproductive as the risks of a big contract outweigh the rewards in many cases. Hence the reason you don't see teams trying to get to the number 1 spot very often anymore.