Rosario vs. Bramble

Here is a subject which is probably not too popular and the fight is probably forgotten now, but on Sept. 25, 1986 Bramble defended his title against Edwin Rosario. Rosario a few months before almost knocked out Hector Camacho. In this fight Edwin stopped Bramble in two rounds after a fairly solid beating for 2 rounds. Bramble said he was thumbed and that is why he went down for the 10 count. Anyone care to comment? Was it a thumb or was Bramble legitimetly knocked out. The fight is on youtube by the way.. Only part.