I have no doubt that it was Bob Bakker from your description and from his theories on the "dino-die-off".
He believes that there are plenty of natural, non-asteroid explanations for the demise of the dinosaurs. Posible viruses and land mass shifts and climatic changes being chief among them.
But his statement about the South American frog as related by you only reinforces my opinion of him as something of a noodle head.
hehehehehe....
he said noodle-head
There is the whole T-Rex was a scavenger argument. Though there have been fossils of Stegs found with healed T-Rex teeth marks so it appears T-Rex went after live and moving thingys.
hehehehe noodle head......
Would that be hard, soft, cooked?