Cardinals manager Tony La Russa doesn't believe that there is a place for performance-enhancing drugs in baseball. "I would agree with those who've said, 'No if, ands or buts -- zero tolerance,' " La Russa said. "If you could get the union to agree with that, that would be a step in the [right] direction." La Russa has staunchly defended Mark McGwire, who refused to answer questions about steroids in baseball during a congressional hearing. "Back in those days, you start really scrutinizing more what each of us could have done," La Russa said. "We all share some of the blame for not being proactive."