At first I thought he was saying he wanted to retire on his stool but I think now he was saying "I can't see" and Loew was cautioning him not to say that out loud or they'll stop the fight. But then there was something else later I think they cut off and Jack said "You ****ing can't!" so maybe that was a want to retire on the stool. I don't know. I've watched this fight twice and I couldn't tell you for sure.
I am not fluent in the blue collar dialect of Youngstown, but a quick plug into babelfish turns up: "Wahhhhhhhhhhhhhhhh wahhhh wah."
I think he was complaining about his blurred vision because of the cuts. If I remember correctly it started as early as the first cut!
At some point after the 9th he said that he couldn't see, and Loew responded "don't ****ing say that". Later on he said something else, and Loew responded "you can't do that", so I assume that Pavlik was considering to quit at that time.