I'm sure every player there knew what the booing was for and probably agreed with it. Milwaukee is just one of those cities where the fans are prone to booing. Suppan, Gagne, Helms, Ned Yost in general, etc. I don't always condone it, but at least the fans care about winning. Some cities are the complete opposite. I've never heard any booing at Safeco Field in Seattle, including during a 16-1 loss that I attended last month. The crowd was entirely unfazed by a 10-0 deficit in the 4th, still cheering enthusiastically like nothing had happened (except a lone dissenter who was quite angry with the Mariners). It was hilarious.