Berto seems injury prone for one thing.

I had to look at boxrec -much to my dismay, Berto has been fighting for 10 years. Doesn't seem that long, but he picked up the NABF & WBC in 2008. Made 5 title defenses. 2 time champ in 2011 for the IBF.

11 years is a good run, I, too think he is past his best, but from my perspective he was cut out for the elite level-as in past tense.

Side note- anyone disagree/agree with this: 5'6 w/68 reach @ WW was to his disadvantage.