Pretty sure he's only one of 2 legit 2 division champs
Won and defended the LW strap several times over.
Fought at 3 different weights, won titles in two, including a win over an unstoppable Matt Hughes.
He never won an interim belt, he never beat a paper champ, he never beat a chump to become champ (well OK Stevenson but he made it legit by stopping Sherk right after)
He was a legit champ. A legit 2 divisional champ. One of the earliest guys to be truly well-rounded and one of the few to be successful across the time span he was successful in.
It sucks for every fighter I'm sure when their career comes to an end and I'm sure BJ has a lot of regrets about things he could have done differently, but he did it his way and his legacy is WAY more than a highlight reel.